SIREGAR, Hikmah; NASUTION, Annio Indah Lestari; QARNI, Waizul. Effectiveness of health services through the mobile-JKN application for the elderly: A case study at the Gunung Tua BPJS health office, North Sumatra . Science Midwifery, [S. l.], v. 13, n. 6, p. 1696–1703, 2026. DOI: 10.35335/midwifery.v13i6.2274. Disponível em: https://midwifery.iocspublisher.org/index.php/midwifery/article/view/2274. Acesso em: 18 apr. 2026.