RT Journal Article SR Electronic T1 International patient charters are often nonbinding or feature fuzzy metrics JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E641 OP E642 DO 10.1503/cmaj.109-3342 VO 182 IS 13 A1 Vogel, Lauren YR 2010 UL http://www.cmaj.ca/content/182/13/E641.abstract