1. Tunçalp Ӧ, Were WM, MacLennan C, Oladapo OT, Gülmezoglu AM, Bahl R, et al. Quality of care for pregnant women and newborns - the WHO vision. BJOG. 2015;122(8):1045–9.
2. Pathé S, Habib B, Joses S, Kirigia M, Nyoni J, Bessaoud K, et al. The Ouagadougou declaration on primary health care and health systems in Africa: achieving better health for Africa in the new millennium. Afr Health Monit. 2010;12:10–21. http://www.aho.afro.who.int/en/ahm/issue/12/reports/ouagadougou-declaration-primary-health-care-and-health-systems-africa-achieving . (Accessed: 27 Oct 2017
3. World Health Organization (WHO). Rio political declaration on social determinants of health. Rio de Janeiro: WHO; 2011. http://www.who.int/sdhconference/declaration/en/ . Accessed: 15 Apr 2018
4. Liu A, Sullivan S, Khan M, Sachs S, Singh P. Community health workers in global health: scale and scalability. Mt Sinai J Med. 2011;78(2):173–81.
5. Singh P, Sachs JD. 1 million community health workers in sub-Saharan Africa by 2015. Lancet. 2013;382(9889):363–5.