RT Journal Article SR Electronic T1 Nonpatentable drugs and the cost of our ignorance JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 483 OP 484 DO 10.1503/cmaj.050663 VO 174 IS 4 A1 Frédéric Calon YR 2006 UL http://www.cmaj.ca/content/174/4/483.abstract