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Illness after international travel.
Ryan ET, Wilson ME, Kain KC. Ryan ET, et al. N Engl J Med. 2002 Aug 15;347(7):505-16. doi: 10.1056/NEJMra020118. N Engl J Med. 2002. PMID: 12181406 Review. No abstract available.
Medical problems in the returning expatriate.
Hochberg N, Ryan ET. Hochberg N, et al. Clin Occup Environ Med. 2004 Feb;4(1):205-19. doi: 10.1016/j.coem.2003.09.001. Clin Occup Environ Med. 2004. PMID: 15043371 Review.
Vaccination strategies.
Ivers LC, Ryan ET. Ivers LC, et al. Clin Occup Environ Med. 2004 Feb;4(1):27-43. doi: 10.1016/j.coem.2003.09.002. Clin Occup Environ Med. 2004. PMID: 15043362