Journal List > Yonsei Med J > v.12(1) > 1136722
Yonsei Medical Journal 1971; 12(1): 55-62.
Published online: 20 February 2002
DOI: https://doi.org/10.3349/ymj.1971.12.1.55
Department of Preventive Medicine and Public Health, Yonsei University College of Medicine, Seoul, Korea.
Copyright © 1971 The Yonsei University College of Medicine