Roopnarinesingh S, Maharaj R J, Morris D, St Louis P
Trop Geogr Med. 1976 Sep;28(3):206-10.
Vitamin B12 and folate levels were studied in Indian and Negro mothers in Trinidad. Folate levels fell in both groups with increasing gestational age. Indian mothers had significantly lower B12 levels than negroes and it is suggested that this vitamin be supplemented.
在特立尼达岛，对印度裔和黑人母亲的维生素B12和叶酸水平进行了研究。随着孕周增加，两组母亲的叶酸水平均下降。印度裔母亲的B12水平显著低于黑人母亲，研究建议对这种维生素进行补充。
