Travel medicine. 1. Before departure.
Behrens
R H
RH
Travel Clinic, Hospital for Tropical Diseases, London, UK.
Steffen
R
R
Looke
D F
DF
D003967:Diarrhea / Q000517:prevention & control; D006801:Humans; D014195:Travel; D014330:Tropical Medicine; D014611:Vaccination