Journal List > Yonsei Med J > v.20(1) > 1028128
Yonsei Medical Journal 1979; 20(1): 39-51.
Published online: 20 February 2002
DOI: https://doi.org/10.3349/ymj.1979.20.1.39
Department of Preventive Medicine and Public Health, Yonsei University College of Medicine, Seoul, Korea.
Copyright © 1979 The Yonsei University College of Medicine