R. R. Jolivet,J. Gausman,R. Adanu,D. Bandoh,M. Belizan,M. Berrueta,S. Chakraborty,E. Kenu,N. Khan,M. Odikro,V. Pingray,S. Ramesh,N. Saggurti,P. Vázquez and A. Langer. Multisite, mixed methods study to validate 10 maternal health system and policy indicators in Argentina, Ghana and India: a research protocol. BMJ Open. 2022;12(1):10.1136/bmjopen-2021-049685.