RT Journal Article SR Electronic T1 The precautionary principle and epidemiology: a contradictio in terminis? JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 883 OP 884 DO 10.1136/jech.56.12.883 VO 56 IS 12 A1 A Tukker YR 2002 UL http://jech.bmj.com/content/56/12/883.abstract AB