Optimal duration of exclusive breast feeding in low income countries.
Black
Robert E
RE
Victora
Cesar G
CG
D000367:Age Factors; D001942:Breast Feeding / Q000706:statistics & numerical data*; D003906:Developing Countries; D005260:Female; D015658:HIV Infections / Q000635:transmission; D006801:Humans; D011203:Poverty; D013997:Time Factors; D014886:Weaning