Engmann Cyril, Wall Stephen, Darmstadt Gary, Valsangkar Bina, Claeson Mariam
Maternal, Newborn and Child Health, Bill & Melinda Gates Foundation, Seattle, WA 98102, USA.
Lancet. 2013 Nov 30;382(9907):e26-7. doi: 10.1016/S0140-6736(13)62293-X. Epub 2013 Nov 16.