Problems and experiences in the field of tropical medicine in the German Democratic Republic.
D000220:Adaptation, Biological; D000367:Age Factors; D005260:Female; D005859:Germany, East; D006801:Humans; D008297:Male; D010272:Parasitic Diseases / Q000453:epidemiology*; D012621:Seasons; D012737:Sex Factors; D014330:Tropical Medicine