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Thomas, Duncan C.1; Petitti, Diana B.2; Goldhaber, Marilyn3; Swan, Shanna H.4; Rappaport, Edward B.1; Hertz-Picciotto, Irva4,5
1From the Department of Preventive Medicine, University of Southern California, Los Angeles, CA
2From the Department of Family and Community Medicine, University of California at San Francisco, San Francisco CA
3From the Division of Research, Kaiser-Permanente Medical Care Program, Oakland, CA
4From the Epidemiological Studies Section, California Department of Health Services, Berkeley, CA.
5From the Present address: Department of Epidemiology, University of North Carolina, Chapel Hill, NC.