1 The Lancet Commission on Essential Medicines Policies, Durban, South Africa; School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.
2 The Lancet Commission on Essential Medicines Policies, Durban, South Africa; Boston University School of Public Health, Boston, MA, USA.
3 The Lancet Commission on Essential Medicines Policies, Durban, South Africa; University Medical Centre Groningen, 9713 AV Groningen, Netherlands.
4 The Lancet Commission on Essential Medicines Policies, Durban, South Africa; Harvard T H Chan School of Public Health, Boston, MA, USA.
5 The Lancet Commission on Essential Medicines Policies, Durban, South Africa; University Medical Centre Groningen, 9713 AV Groningen, Netherlands. Electronic address: h.v.hogerzeil@umcg.nl.