TY - JOUR T1 - If we're so different, why do we keep overlapping? When 1 plus 1 doesn't make 2 JF - Canadian Medical Association Journal JO - CMAJ SP - 65 LP - 66 VL - 166 IS - 1 AU - Rory Wolfe AU - James Hanley Y1 - 2002/01/08 UR - http://www.cmaj.ca/content/166/1/65.abstract ER -