About PARSONNET J
About Stanford Univ. School of Medicine, Calif.
About HANSEN S
About Cancer Registry of Norway, Oslo
About RODRIGUEZ L
About Stanford Univ. School of Medicine, Calif.
About GELB A B
About Stanford Univ. School of Medicine, Calif.
About WARNKE R A
About Stanford Univ. School of Medicine, Calif.
About JELLUM E
About Norwegian Cancer Soc., Oslo
About ORENTREICH N
About Orentreich Foundation for the Advancement of Science, N.Y.
About VOGELMAN J H
About Orentreich Foundation for the Advancement of Science, N.Y.
About FRIEDMAN G D
About Kaiser Permanente Medical Care Program, Calif.
About New England Journal of Medicine
About Helicobacter