Implementation research for strengthening health systems in India. - Zachariah, Rony; Thekkur, Pruthu; Nair, Divya; Davtyan, Hayk; Tripathy, Jaya Prasad; Chinnakali, Palanivel; Gupte, Himanshu A.; Harries, Anthony D.; Reeder, John C. (Indian Journal of Medical Research, 2024)