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HEREDITARY FACTORS SPONTANEOUS COUGH AND SMOKERS COUGH - A STUDY ON 7800 TWIN-PAIRS WITH AID OF MAILED QUESTIONNAIRES
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ON VALIDITY OF MAILED QUESTIONNAIRES IN DIAGNOSING ANGINA PECTORIS AND BRONCHITIS
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RESPIRATORY SYMPTOMS AND ANGINA PECTORIS IN TWINS WITH REFERENCE TO SMOKING HABITS - AN EPIDEMIOLOGICAL STUDY WITH MAILED QUESTIONNAIRE
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RESPIRATORY CONDITIONS IN OUTSIDE WORKERS - REPORT ON OUTSIDE PLANT TELEPHONE WORKERS IN SAN-FRANCISCO AND LOS-ANGELES
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SOME USES OF PROSPECTIVE OBSERVATIONS IN TECUMSEH COMMUNITY HEALTH STUDY
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