Surveys: an introduction.
Rubenfeld
Gordon D
GD
Division of Pulmonary and Critical Care Medicine, Box 359762, Harborview Medical Center, 325 9th Avenue, Seattle, WA 98104-2499, USA. nodrog@u.washington.edu
D015982:Bias; D019538:Health Care Surveys / Q000706:statistics & numerical data; D006801:Humans; D011795:Surveys and Questionnaires