RT Journal Article SR Electronic T1 Medicos viajeros Boliviaros JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 602 OP 602 DO 10.1503/cmaj.080110 VO 178 IS 5 A1 Donna E. Stewart MD YR 2008 UL http://www.cmaj.ca/content/178/5/602.abstract