Foreign exchanges.
Levin
R
R
D000533:Altruism; D001325:Autobiographies as Topic; D003906:Developing Countries; D005180:Faculty, Medical; D005260:Female; D006176:Gynecology; D006801:Humans; D007231:Infant, Newborn; D008493:Medical Missions; D009774:Obstetrics; D011247:Pregnancy; D013188:Sri Lanka