Accuracy of a smartphone application for blood pressure estimation in Bangladesh, South Africa, and Tanzania oleh Charles Festo, Valerie Vannevel, Hasmot Ali, Tigest Tamrat, Getrud J. Mollel, Tsakane Hlongwane, Kaniz A. Fahmida, Kelsey Alland, María Barreix, Hedieh Mehrtash, Ronaldo Silva, Soe Soe Thwin, Garrett Mehl, Alain B. Labrique, Honorati Masanja, Ӧzge Tunçalp