Arch Environ Health 1997, 52:409-15.34. Kaerlev L, Lynge E, Sabroe S, Olsen J: Colon
cancer controls ver-sus population controls
in case-control studies
of occupa-tional
risk factors. BMC
Cancer 2004, 22:15.35. Wang Y, Lewis-Michl EL, Hwang SA, Fitzgerald EF, Stark[r]