Comparison of personal interview and postal inquiry methods for assessing prevalence of angina and possible infarction.
D000787:Angina Pectoris / Q000453:epidemiology*; D003142:Communication; D003327:Coronary Disease / Q000401:mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000453:epidemiology*; D009664:Norway; D011795:Surveys and Questionnaires