TY - JOUR T1 - Clinical-trial registration: a call for its implementation in Canada JF - Canadian Medical Association Journal JO - CMAJ SP - 1657 LP - 1658 VL - 149 IS - 11 AU - D. Moher Y1 - 1993/12/01 UR - http://www.cmaj.ca/content/149/11/1657.abstract ER -