Oladele D, Iwelunmor J, Gbajabiamila T, Obiezu-Umeh C, Okwuzu JO, Nwaozuru U, Musa AZ, Idigbe I, Tahlil K, Tang W, Conserve DF, Rosenberg NE, David AN, Tucker J, Ezechi O. The 4 Youth By Youth mHealth Photo Verification App for HIV Self-testing in Nigeria: Qualitative Analysis of User Experiences. JMIR Form Res. 2021 Nov 17; 5(11):e25824.