Olusanya Bolajoko O, Newton Valerie E
Unit of Audiological Medicine, Institute of Child Health, University College London, London WC1N 1EH, UK; Institute of Child Health and Primary Care, College of Medicine, University of Lagos, Lagos, Nigeria.
University of Manchester, Manchester M13 9PL, UK.
Lancet. 2007 Apr 14;369(9569):1314-1317. doi: 10.1016/S0140-6736(07)60602-3.