Lombard Carl, Cousens Simon, Tylleskär Thorkild, Van de Perre Philippe, Nagot Nicolas
Biostatistics Unit, Medical Research Council of South Africa, Cape Town, South Africa.
Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.
Lancet. 2016 May 21;387(10033):2091. doi: 10.1016/S0140-6736(16)30540-2.