Assessing the Quality of the World Health Organization’s Skin NTDs App as a Training Tool in Ghana and Kenya: Protocol for a Cross-sectional Study - Asmae Frej; Mireia Cano; José A Ruiz-Postigo; Paul Macharia; Richard Odame Phillips; Yaw Ampem Amoako; Carme Carrion (JMIR Research Protocols, 2022)