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(Click for frequent words.) 74 secondhand smoke 67 Passive smoking 62 secondhand smoke exposure 62 secondhand cigarette 61 cigarette smoking 59 smoking 59 secondhand tobacco 58 Secondhand smoke 58 cigarette smoke 57 smokers 56 inhaling secondhand smoke 54 Tobacco Smoke 54 asbestos exposure 53 nonsmokers 53 thirdhand smoke 52 smoking bans 52 cardio vascular disease 52 Passive Smoking 51 Cigarette smoking 51 secondhand smoke SHS 51 smoky atmospheres 51 bidi smokers 50 carcinogens 50 Secondhand smoke exposure 50 smokefree workplaces 50 cigarettes smoked 50 banning smoking 50 Smoking 50 smokefree 50 PM#s 49 electromagnetic fields EMFs 49 heart disease 49 cardiovascular disease CVD 49 Secondhand smoke kills 49 Peruga 48 cigarette packets 48 Professor Daube 48 air pollution 48 lung cancer 48 sunbeds 48 vitamin D deficiency 48 NNK 48 diesel fumes 48 beta carotene supplements 48 salt intake 48 smoker 48 Dr. Yolton 48 occupational exposures 48 Cigarette smoke 47 harmful effects 47 circulatory diseases 47 smoking ban 47 menthol smokers 47 director Ben Youdan 47 dietary acrylamide 47 death syndrome SIDS 47 Leonardi Bee 47 COPD 47 Deborah Arnott 47 pesticide poisonings 47 Alcohol Concern 47 dietary sodium 47 coronary heart 47 shisha smoking 47 vitamin D insufficiency 46 phthalate exposure 46 asthma bronchitis 46 EMFs 46 spontaneous preterm delivery 46 lungs Setree 46 binge drinking 46 solariums 46 lung diseases 46 inhale secondhand smoke 46 bowel cancer 46 invasive meningococcal disease 46 Listeria infections 46 HPV infection 46 Tobacco Epidemic 46 Jane Wardle 46 prenatal exposures 46 radon induced 46 Bowel cancer 46 menthol flavoring 46 asbestos fibers 46 Pleural plaques 46 airborne asbestos fibers 46 oropharyngeal cancer 46 UVR exposure 46 smokefree legislation 45 enclosed workplaces 45 Prof Olver 45 SE alleles 45 cotinine 45 inhaling asbestos fibers 45 Mike Daube 45 lung cancer emphysema 45 breathe secondhand smoke 45 Nicotine addiction 45 Anthony Swerdlow 45 bmj.com 45 pharyngeal cancer 45 noncommunicable diseases 45 die prematurely 45 Sunbeds 45 unhealthy diets 45 diesel particulates 45 cotinine levels 45 obesogenic environment 45 PM#.# 45 preventable deaths 45 carcinogen 45 Interphone study 45 hypovitaminosis D 45 indoor radon 45 Postnatal depression 45 cardiovascular disease 45 Hand Smoke 45 carcinogenic 44 MMR jabs 44 oropharyngeal cancers 44 Peanut allergy 44 Chlamydia infection 44 Sara Hiom director 44 Secondhand smoke causes 44 particulate pollution 44 nicotine addicts 44 saturated fat intake 44 colorectal bowel 44 GYTS 44 endocrine disrupting chemicals EDCs 44 acrylamide intake 44 Chewing tobacco 44 iodine intake 44 electrosensitivity 44 Maternal obesity 44 interstitial lung abnormalities 44 unimmunised 44 enterovirus infection 44 Physical inactivity 44 Benzo pyrene 44 acid suppressive medication 44 sickness absence 44 beta carotene supplementation 44 reproductive toxins 44 Trasande 44 superbug MRSA 44 inhaled secondhand smoke 44 Smoking Kills 44 nosocomial infections 44 sicknote culture 44 sunbed 44 Sudden Adult 44 Vitamin D insufficiency 44 pleural plaques 44 bronchitis asthma 44 unintentional poisonings 44 caffeine intake 44 acrylamide 44 Patricia Buffler 44 childbed fever 44 Vitamin D deficiency 44 Lidia Morawska 44 lung cancer mesothelioma 44 lung cancer asbestosis 44 radiofrequency radiation 44 oesophageal cancer 44 gum disease 44 pesticide residues 44 ultrafine particles 44 silica dust 44 smoke 44 Pre eclampsia 44 Epidemiological studies 43 diesel exhaust 43 eating fatty foods 43 tobacco 43 waterpipe tobacco smoking 43 SUDEP 43 Non communicable diseases 43 Particulate matter 43 Tak Nak 43 pre eclampsia 43 Binge drinking 43 bowel cancers 43 asthma chronic bronchitis 43 BLLs 43 hormone disrupting 43 invasive cervical cancer 43 cancers 43 HPV 43 Epidemiology Unit 43 Mrs McTear 43 waterpipe smoking 43 Shona Robison 43 disease COPD 43 Terry Pechacek 43 de ath 43 cigarette butt litter 43 consanguineous marriages 43 COMARE 43 nonsmoker 43 lung disease 43 controversial MMR jab 43 anal cancers 43 #,# DCB 43 diseased gums 43 unintentional poisoning 43 folic acid intake 43 periodontal infection 43 antioxidant supplements 43 PBDE chemicals 43 inhaling asbestos 43 obesity 43 Jonathan Winickoff 43 folate intake 43 diacetyl 43 pleural plaques scarring 43 chlamydial infection 43 indoor tanning beds 43 Fund WCRF 43 SIDS 43 overdiagnosis 43 electromagnetic fields 43 childhood leukemia 43 kernicterus 43 chronic bronchitis 43 radon 43 Armando Peruga 43 persistent wheezing 43 unsafe abortions 43 Day WNTD 43 Ozone disinfection produces 43 Diesel exhaust 43 rhinovirus infection 43 respirable particles 43 subclinical hyperthyroidism 43 lung ailments 43 UV exposure 43 COPD emphysema 43 nondrinkers 43 orofacial clefts 43 untreated OSA 43 postmenopausal breast cancer 43 PM#.# particles 42 WCRF 42 uncontrolled asthma 42 charity Alcohol Concern 42 Asbestosis 42 Cardiovascular disease 42 Hygiene Hypothesis 42 ARIs 42 asthmatic symptoms 42 salivary cotinine 42 Robert Beaglehole 42 untreated sleep apnea 42 acute bronchitis 42 drinking diet sodas 42 Dr. Maria Neira 42 menthol cigarette smokers 42 non fasting triglycerides 42 vCJD 42 pulmonary TB 42 MMR jab 42 dietary sodium intake 42 Chest x rays 42 asbestos 42 allergen exposures 42 familial pancreatic cancer 42 C Diff 42 binge drink 42 Heavy snorers 42 artificial tanning 42 venous blood clots 42 Tarani Chandola 42 UVB exposure 42 asthma 42 indoor tanning 42 antibiotic overuse 42 E.coli O# 42 Primary biliary cirrhosis 42 hookah smokers 42 trans fats 42 skin cancers 42 #mg/#ml 42 cigarette smokers 42 hookah parlors 42 Boom billows 42 Tobacco Control 42 Lung cancer 42 heaviest drinkers 42 respiratory illnesses 42 asthma exacerbations 42 venous thrombosis 42 spokeswoman Jackie Baillie 42 BRCA carriers 42 cigarette vending machines 42 calcium intake 42 Mika Kivimaki 42 de aths 42 Vitamin supplements 42 dioxins 42 Shenassa 42 Dr Kiro 42 MMR vaccine 42 SmokeFreeOhio 42 non communicable diseases 42 elevated CRP 42 UVA radiation 42 NAFLD 42 cervical cancer 42 bowel polyps 42 Cot Death 42 preventable illnesses 42 fine particulate pollution 42 menthol flavored cigarettes 42 Liver cirrhosis 42 electromagnetic hypersensitivity 42 Drowsy driving 42 bronchitis emphysema 42 asthma eczema 42 XMRV infection 42 Peanut allergies 42 dental decay 42 serum cotinine levels 41 particulate pollutants 41 Diabetic Medicine 41 smokers inhale 41 ESPAD 41 #mph zones 41 unborn babies 41 folate deficiency 41 pesticide exposures 41 Gauderman 41 pneumococcal infection 41 Cervical cancer 41 Peter Gotzsche 41 Amanda Sandford 41 food induced anaphylaxis 41 exertional heat related 41 hepatitis B virus 41 potent carcinogen 41 legionnaires disease 41 snus 41 particulates 41 carbon monoxide nitrogen dioxide 41 Health Protection Agency 41 untreated celiac disease 41 Swedish snus 41 C diff 41 methyl mercury 41 chlamydia infection 41 liver cirrhosis 41 manmade greenhouse gases 41 alcoholic liver 41 SV Subramanian 41 osteoporotic fractures 41 haemorrhagic stroke 41 psychotic illnesses 41 Kivipelto 41 campylobacteriosis 41 Stephanie Belloc 41 fine particle pollution 41 hygiene hypothesis 41 folate supplementation 41 respiratory illness 41 Dengue infects 41 CCP antibodies 41 lignan intake 41 premenopausal breast cancer 41 Associate Professor LaMontagne 41 aggravates respiratory 41 foodborne diseases 41 epidemiological studies 41 Vitamin D supplements 41 Morawska 41 E.coli O# outbreak 41 minister Dawn Primarolo 41 Michael Leitzmann 41 combination Peruga 41 Health Organisation 41 eat unhealthily 41 cannabis induced psychosis 41 Non Ionising Radiation 41 Chronic cough 41 shorter telomeres 41 ultraviolet radiation 41 Acrylamide 41 Nonsmokers exposed 41 legalizing euthanasia 41 Tashkin 41 Rolah McCabe 41 antismoking 41 Vitamin D deficiencies 41 Stomach cancer 41 Chronic insomnia 41 unhealthy lifestyles 41 infants Sundlof 41 neonatal herpes 41 fructose intake 41 rotavirus infection 41 Separating smokers 41 Elisabeth Cardis 41 rotavirus diarrhea 41 Contraceptive pill 41 asbestosis 41 caesarean births 41 Joseph McClernon 41 Indoor tanning 41 sudden cardiac death 41 Colorectal cancer 41 maternal morbidity 41 radiation exposure 41 mercury toxicity 41 nitrogen dioxide 41 shisha 41 symptomless 41 prostate carcinogenesis 41 Folic Acid Supplements 41 ALDH2 deficient 41 alcoholic cirrhosis 41 sexually transmitted HPV 41 Ian Willmore 41 journal Thorax 41 bTB 41 C.diff 41 legionella bacteria 41 rotavirus gastroenteritis 41 vitamin D intake 41 PSA screening 41 decriminalizing cannabis 41 prescribed isotretinoin 41 modifiable lifestyle 41 Norovirus infection 41 ocular toxicity 41 nosocomial infection 41 Particle pollution 41 sidestream smoke 41 Secondhand Smoke 41 Susanna Larsson 41 thrombosis blood clots 41 diacetyl vapors 41 smoked menthol cigarettes 41 genital HPV infections 41 cardiovascular mortality 41 Detective Zadroga 41 SmokeFree Liverpool 41 Krishnan Bhaskaran 41 nicotine dependence 41 cardiovascular diseases 41 noncancer 41 cotinine metabolite 41 reformed smoker 41 habitual snoring 41 utero exposure 41 antidepressant Seroxat 41 sugar sweetened soft drinks 41 LQTS 41 smoking hookah 41 eating unhealthily 41 Fabienne Simon 41 Coronary heart 41 bedsharing 41 Patrick Breysse 41 Foetal Alcohol Syndrome 41 Neurological disorders 41 recurrent miscarriages 41 sleep disordered breathing 41 unhealthy dietary habits 41 infantile colic 41 Frank Soodeen 41 antenatal depression 41 B# deficiency 41 nonsmoking 41 inherited predisposition 41 oesophageal cancers 40 Pleural mesothelioma 40 clinically obese 40 metabolic syndrome MetS 40 workless households 40 cigarette butts 40 Hsin Chieh Jessica 40 inveterate smokers 40 C. diff 40 Undernutrition 40 unmeasured confounders 40 Pictorial warnings 40 Ghiyath Shayeb 40 Genetic predisposition 40 ultra violet radiation 40 flames everywhere Faizi 40 chronic rhinosinusitis 40 hospital superbug MRSA 40 CA MRSA infections 40 UV radiation 40 Ascherio 40 claiming incapacity 40 Hsin Chieh Yeh 40 vitamin D inadequacy 40 Stillbirths 40 residual confounding 40 MMR immunization 40 endocrine disruptors 40 eating microwave popcorn 40 CO poisoning 40 sheesha smoking 40 C difficile 40 overusing antibiotics 40 overflowing ashtray 40 elevated homocysteine 40 aggravate asthma 40 Periodontal disease 40 placental malaria 40 Drink spiking 40 discarded cigarette butts 40 childhood sunburns 40 Dr Wedad 40 disease vCJD 40 carcinogenic chemicals 40 betel nut chewing 40 upper gastrointestinal bleeding 40 Epstein Barr virus 40 Jackie Baillie 40 Carbon Monoxide 40 E.coli bug 40 addictive nicotine 40 gastro outbreak 40 Millennium Cohort Study 40 artery calcification 40 carelessly disposed 40 fine particulate matter 40 Char Broil vertical 40 superbug Clostridium difficile 40 Jarup 40 Charmaine Griffiths 40 Minister Gillian Merron 40 Antismoking 40 David Spiegelhalter 40 modifiable risk 40 Joshua Schier 40 campylobacter infection 40 Skip Legault 40 acoustic neuroma 40 Oesophageal cancer 40 ultraviolet UV radiation 40 chemical bromate 40 Folic acid deficiency 40 MMR uptake 40 tobacco specific nitrosamines 40 NNAL 40 HCAIs 40 Legionnaires Disease 40 Physicians RCP 40 Prof Daube 40 airborne particles 40 manganism 40 Sids 40 Neurology Neurosurgery 40 Ionising radiation 40 bmj.com today 40 Daskalopoulou 40 DVT 40 Grace LeMasters 40 International Obesity Taskforce 40 CMV infection 40 spokeswoman Shona Robison 40 rhinosinusitis 40 paternal discrepancy 40 Cervical screening 40 airborne pollutant 40 Hidden Harm 40 Motor neurone disease 40 sedentary lifestyles 40 Munk Olsen 40 MMR vaccination 40 BMJ formerly 40 acute coronary 40 drink spiking 40 untreated STDs 40 Binoniemi 40 Infant Deaths 40 MDR tuberculosis 40 Smoke Free 40 Smoking bans 40 dental caries 40 toxicants 40 elevated triglyceride levels 40 Moderate drinkers 40 Prenatal Alcohol 40 Human Papilloma Virus 40 Lorna Thorpe 40 Board NRPB 40 physical inactivity 40 sepsis infection Notaros 40 powerfully addicting 40 selenium intake 40 pleural plaque 40 KIF6 gene 40 Colorectal cancers 40 disease CHD 40 ladette culture 40 dietary intake 40 minister Shona Robison 40 asymptomatic bacteriuria 40 Thoracic Society 40 asthma hay fever 40 Involuntary Exposure 40 carcinogenic compounds 40 type2 diabetes 40 fetal malformations 40 cardio vascular diseases 40 obesity epidemic 40 Foodborne illnesses 40 Dengue haemorrhagic fever 40 environmental toxicants 40 Carbon monoxide CO 40 particulate matter 40 Foetal Alcohol Spectrum Disorder 40 Nordic Cochrane 40 SRBD 40 carelessly discarded 40 SADS 40 containing mouthwashes 40 herpes simplex encephalitis 40 Epileptic seizures 40 Obesity 40 shisha smokers 40 anthropogenic emissions 40 Postnatal Depression 40 COPD sufferers 40 NHS Smoking Helpline 40 Champix 40 undiagnosed sleep apnea 40 genetic susceptibility 40 carcinogen NNK 40 Kirsten Bibbins Domingo 40 journal Epidemiology 40 C.difficile 40 Teh wei Hu 40 pesticide poisoning 40 Vitamin D supplementation 40 Stillbirth 40 Robert Booy 40 Ian Olver 40 Pneumococcal pneumonia 40 sun ultraviolet radiation 40 VTE 39 9pm watershed 39 golden staph 39 hepatitis B infection 39 airway hyperresponsiveness 39 Homocysteine 39 grandmother Arlene Sauder 39 Sexually transmitted infections 39 periodontal disease 39 digestive tract cancers 39 Minamata disease 39 familial hypercholesterolaemia FH 39 chews nicotine gum 39 fine particulates 39 folic acid supplementation 39 Sporadic CJD 39 Gastric cancer 39 Weedless Wednesday 39 chlamydia infections 39 SIDS Sudden Infant Death 39 Vibrio infections 39 sideeffects 39 chlorinated pools 39 fatal IHD 39 periodontal bacteria 39 periodontitis 39 CVD mortality 39 organophosphate exposure 39 medical journal Thorax 39 familial predisposition 39 HBV infection 39 trivial Klatsky 39 Marianna Virtanen 39 preventible 39 Coeliac disease 39 melioidosis 39 INTERHEART study 39 rosiglitazone Avandia 39 Nosocomial infections 39 non menthol smokers 39 VicHealth 39 follicular adenoma 39 PFOA 39 ectopic pregnancy 39 iodine deficient 39 mesotheliomas 39 measles epidemic 39 FSID 39 laryngeal cancer 39 WNV infections 39 Diarrheal disease 39 inhaling smoke 39 sweetener aspartame 39 electromagnetic radiation 39 HPV# 39 Associated Infections 39 cotinine byproduct 39 Dr Stoate 39 musculoskeletal disorders MSDs 39 teenage conceptions 39 C.Diff 39 fluorosis 39 Folic acid supplements 39 MRSA bloodstream infection 39 FeNO 39 aggravates asthma 39 Urinary tract infections UTIs 39 TSNAs 39 APOE e4 allele 39 gender bending chemicals 39 underage binge drinking 39 chlamydial infections 39 nonmelanoma skin cancer 39 CNCDs 39 cTnT levels 39 Hormone pills 39 E. coli sickens 39 neural tube defect 39 Unsafe abortions 39 paralyzing fatalism 39 Nonsmokers 39 mesothelioma 39 ionizing radiation 39 DVT blood clots 39 recurrent wheezing 39 spiral CT scans 39 Cigarette packets 39 author Katherine Flegal 39 Zinc deficiency 39 antipsychotic prescribing 39 tanning beds 39 artificial sweetener aspartame 39 journal Injury Prevention 39 Adam Brimelow 39 folate intakes 39 eczema hay fever 39 PBDE exposure 39 Global Tobacco Epidemic 39 unmeasured factors 39 quitlines 39 AAT deficiency 39 periodontal diseases 39 estrogen progestin combination 39 Andrew Renehan 39 obese 39 Navas Acien 39 airway constriction 39 Nick Sheron 39 Kheifets 39 Welfare AIHW 39 chronic respiratory illnesses 39 malaria endemic areas 39 Buijsse 39 bacterium Helicobacter pylori 39 acetaminophen overdoses 39 David Stuckler 39 pollutants emitted 39 PBDEs 39 cervical screening 39 Professor Collignon 39 hyperemesis gravidarum 39 Ichiro Kawachi 39 dentinal hypersensitivity 39 nonsmoking patrons 39 peanut allergy 39 invasive pneumococcal disease 39 Ms Sharkie 39 superbug infections 39 influenza epidemics 39 beryllium dust 39 abdominal obesity 39 Prof Swinburn 39 cockroach allergens 39 violent victimizations 39 EV# virus 39 antioxidant intake 39 genital ulcers 39 Environmental Epidemiology 39 multidrug resistant bacteria 39 ingesting fluoride 39 pleural mesothelioma 39 prenatal exposure 39 drank decaffeinated coffee 39 Diarmid Campbell Lendrum 39 inhalant abuse 39 BRCA1 mutations 39 Hib disease 39 Petrol sniffing 39 Agent Orange exposure 39 Cirrhosis 39 blistering sunburn 39 Dr Zorbas 39 elective caesarean sections 39 melanoma skin 39 binge drinkers 39 STIs 39 C. diff infection 39 journal Nicotine 39 RIVM 39 lung cancers 39 radon concentrations 39 perinatal mortality 39 SMOKING 39 thimerosal autism 39 endocrine disrupting chemicals 39 SMOKERS 39 probiotic supplementation 39 diabetes Buerger Disease 39 C diff infection 39 Journal BMJ 39 radiation emitted 39 Acta Paediatrica 39 testicular germ cell 39 sodium intake 39 prescribed statins 39 vitamin D 39 amphibole asbestos 39 NO2 39 mamey fruit bars 39 vCJD epidemic 39 Richard Peto 39 NOMID 39 RCOG 39 Chlamydia pneumoniae 39 Tanning beds 39 Occupational Hygiene 39 Substance misuse 39 exposed prenatally 39 accidental needlestick injuries 39 Michael F. Leitzmann 39 Silicosis 39 Breathing ozone 39 ug/m3 39 Cancer Epidemiology 39 occupationally exposed 39 sunbed salons 39 colorectal neoplasia 39 Unintentional injuries 39 daytime naps 39 Ireland RPII 39 Short telomeres 39 Karin Michels 39 Pneumococcal disease 39 Pneumococcal meningitis 39 Caffeinated beverages 39 endotoxins 39 Severe acute malnutrition 39 atherothrombotic disease 39 Nicotine Addiction 39 Kahui twins 39 vitamin D supplements 39 dose ionizing radiation 39 flavonoid intake 39 Sir Liam Donaldson 39 Prostitution Reform Act 39 anorexia sufferers 39 anthropogenic greenhouse gas 39 pneumococcal infections 39 aristolochic acid 39 Peter Ucko 39 bioaerosols 39 perfluorinated chemicals PFCs 39 peptic ulcers 39 Brenda Eskenazi 39 HFMD 39 WTC responders 39 amphibian declines 39 postnatal depression 39 premature wrinkling 39 gallstone disease 39 neurologic complications 39 Cecilia Ramlau Hansen 39 testicular cancers 39 Abdominal fat 39 c diff 39 Male infertility 39 asthma sufferers 39 carcinogenic substances 39 bluetongue virus 39 dust mite allergies 39 vitamin B# deficiency 39 vegetable intake 39 postsurgical complications 38 ultraviolet UV rays 38 nonfatal heart 38 unwanted teenage pregnancies 38 Cotinine 38 respiratory diseases 38 selenium supplements 38 lyssavirus 38 anovulatory infertility 38 SunSmart campaign 38 hormonal disturbances 38 fluoride ingestion 38 Minister Shona Robison 38 mentholated cigarettes 38 lung function 38 Chlamydia 38 smoke menthol cigarettes 38 Malignant melanoma 38 Cerebral malaria 38 genital herpes infections 38 selenium supplementation 38 Drug Misuse 38 nicotine metabolite 38 colorectal cancer 38 Schabath 38 Izzarelli bore responsibility 38 unintentional overdoses 38 Woolcock Institute 38 drank colas 38 Douglas Bettcher 38 obesity timebomb 38 meningococcal disease 38 LABAs 38 discarding cigarette butts 38 benzopyrene 38 Rotavirus 38 atopic disease 38 thimerosol 38 potentially modifiable 38 bisphenol A. 38 organophosphate pesticides 38 causal link 38 malignant melanomas 38 aspartame 38 hantavirus infection 38 MRSA germs 38 dental amalgams 38 H. pylori 38 coronary revascularizations 38 Cystic fibrosis affects 38 Excess sodium 38 John Bowis 38 myalgic encephalomyelitis ME 38 SIDS infants 38 Amminger 38 Wheelchair accessible valet parking 38 Jane O'Hallahan 38 atypical scrapie 38 congenital birth defects 38 serosorting 38 Flu jabs 38 drowsy driving 38 carbon monoxide 38 Genetic mutation 38 sea lice 38 preventable hospitalizations 38 Human metapneumovirus 38 Stanton Glantz 38 microalbuminuria 38 LHVs 38 unhealthy snacking 38 BRCA mutation 38 blistering sunburns 38 journal Chest 38 inhaled TPI 38 smoke menthols 38 Measles Mumps 38 Dr. Ted Boadway 38 wart virus 38 magnesium intake 38 legionella bug 38 statins 38 Lowering cholesterol 38 crystalline silica 38 persistent pulmonary hypertension 38 dietary calcium 38 Irva Hertz Picciotto 38 indoor dampness 38 bacteria Streptococcus pneumoniae 38 nicotine 38 untreated ADHD 38 diesel particulate matter 38 faecal bacteria 38 oesophageal adenocarcinoma 38 periodontal gum disease 38 dietary habits 38 Janice Pou 38 diarrheal infections 38 cancerdefine 38 legalizing brothels 38 atherothrombotic 38 Deep Vein Thrombosis DVT 38 brain tumors 38 harmful gases 38 C difficile infection 38 culling badgers 38 psychiatric morbidity 38 PM# [003] 38 herpes infection 38 perfluoroalkyl acids 38 subclinical atherosclerosis