TY - BOOK AU - Rothman,Kenneth J. TI - Epidemiology: an introduction SN - 9780199754557 (pbk. : alk. paper) AV - RA651 .R68 2012 U1 - 614.4 23 PY - 2012/// CY - New York, NY PB - Oxford University Press KW - Epidemiologic Methods ER -