American Statistical Association, 1995

JSTOR, 1995

National Institute of Environmental Health Sciences. National Institutes of Health. Department of Health, Education and Welfare, 1995

Elsevier BV, 1995

Massachusetts Medical Society, 1995

Massachusetts Medical Society, 1993

American Chemical Society (ACS), 1993

Wiley, 1993

Sigma Xi Scientific Research Society, 1992

Massachusetts Medical Society, 1991

Wiley, 1990

Wiley, 1990

Elsevier BV, 1990

American Chemical Society (ACS), 1989

American Association for the Advancement of Science (AAAS), 1987

American Association for the Advancement of Science (AAAS), 1987

American Chemical Society (ACS), 1986

American Chemical Society (ACS), 1983

American Public Health Association, 1982

American Institute of Biological Sciences, 1982