RT Journal Article SR Electronic T1 Truth and direct-to-consumer advertising in Canada of DUKORAL for traveler’s diarrhea prevention JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 171 OP 173 VO 65 IS 3 A1 Rudy Zimmer YR 2019 UL http://www.cfp.ca/content/65/3/171.abstract AB