TY - JOUR T1 - The choice of contrast media: medical, ethical and legal considerations JF - Canadian Medical Association Journal JO - CMAJ SP - 1321 LP - 1324 VL - 147 IS - 9 AU - D. J. Roy AU - B. M. Dickens AU - M. McGregor Y1 - 1992/11/01 UR - http://www.cmaj.ca/content/147/9/1321.abstract ER -