Strengthening Immunization Data: Protocol for the Evaluation of an Electronic Immunization Register. - Sheel M; Patel C; Saravanos G; Lynch M; Tinessia A; Chanlivong N; Thongseng M; Gunaratnam P; Pathammavong C; Phounphenghack K; Park Y; Norasingh S; et al. (JMIR research protocols, 2025)