RT Journal Article SR Electronic T1 International Travel and Health: Vaccination Requirements and Health Advice JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 122 OP 123 DO 10.3122/jabfm.5.1.122a VO 5 IS 1 A1 Geoffrey Goldsmith YR 1992 UL http://www.jabfm.org/content/5/1/122.2.abstract AB