Examination in Children
•Pitzinger B, Steffen R, Tschopp A. Incidence and clinical features of traveler’s diarrhea in infants and children. Pediatr infect Dis J 1991; 10: 719-23.
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•Prospective recruitment from a Zurich travel clinic 1987-88.
•Retrospective surveys upon return. 
–81% response rate  (Very good) n = 363