Use of world wide web-based directories for tracing subjects in epidemiologic studies. Koo MM, Rohan TE. Am J Epidemiology 2000;152:889–894.
Thomas J LiesegangVolume:
131
Year:
2001
Language:
english
DOI:
10.1016/s0002-9394(01)00989-8
File:
PDF, 113 KB
english, 2001