by Klausner, Jeffrey D, Wolf, Wendy, Fischer-Ponce, Lyn, Zolt, Ilene, Katz, Mitchell H
Published in JAMA : the journal of the American Medical Association (26.07.2000)

by McFarland, W, Fischer-Ponce, L, Katz, M H
Published in American journal of epidemiology (01.10.1995)