TY - JOUR A1 - Salihu, H.M. A1 - Chatman, L.M. A1 - Alio, A.A. A1 - Aliyu, M.H. A1 - Kirby, R.S. A1 - Alexander, G.R. T1 - Single motherhood and neonatal survival of twins among blacks and whites Y1 - 2004 JF - Journal of the National Medical Association VL - 96 IS - 12 ER -