RT Journal Article SR Electronic T1 Brazilian health care faces harsh choices JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1107 OP E1108 DO 10.1503/cmaj.109-3996 VO 183 IS 15 A1 Villanueva, Tiago YR 2011 UL http://www.cmaj.ca/content/183/15/E1107.abstract