TY - JOUR T1 - Registration of observational studies: Is it time? JF - Canadian Medical Association Journal JO - CMAJ DO - 10.1503/cmaj.092252 AU - Rebecca J. Williams AU - Tony Tse AU - William R. Harlan AU - Deborah A. Zarin Y1 - 2010/07/19 UR - http://www.cmaj.ca/content/early/2010/07/19/cmaj.092252.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -