TY - BOOK AU - Olsen,Jørn AU - Christensen,Kaare AU - Murray,Jeff AU - Ekbom,Anders TI - An introduction to epidemiology for health professionals T2 - Springer series on epidemiology and health, SN - 9781441914965 AV - RA651 .I58 2010 PY - 2010/// CY - New York PB - Springer KW - Epidemiology KW - Epidemiologic Methods ER -