RT Journal Article SR Electronic T1 Calculating cancer risk: It is harder than it seems JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 220 OP 221 VO 64 IS 4 A1 Iviaurie Markman YR 1997 UL http://www.ccjm.org/content/64/4/220.abstract AB