Telehealth initiative to enhance primary care access in Brazil (UBS plus digital project): multicenter prospective study - Lamas, Celina Almeida; Alves, Patricia Gabriela Santana; Araujo, Luciano Nader de; Paes, Ana Beatriz de Souza; Cielo, Ana Claudia; Lopes, Luciana Maciel de Almeida; Melo, Andre Longo Araujo de; Yokoyama, Thais; Savastano, Clarice Pagani; Carvalho, Carlos Roberto Ribeiro De (Journal of Medical Internet Research, 2025)