Viral hepatitis in American missionaries abroad.
D000293:Adolescent; D000328:Adult; D000349:Africa; D000367:Age Factors; D001208:Asia; D002489:Central America; D002648:Child; D005060:Europe; D005843:Geography; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D008800:Mexico; D008875:Middle Aged; D066189:Missionaries; D008921:Religious Missions; D013020:South America; D014481:United States