RT Journal Article SR Electronic T1 Relative risks or odds ratios? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1529 OP 1529-a VO 168 IS 12 A1 Madhu K. Natarajan A1 Rizwan Afzal YR 2003 UL http://www.cmaj.ca/content/168/12/1529.2.abstract