Telehealth Initiative to Enhance Primary Care Access in Brazil (UBS+Digital Project): Multicenter Prospective Study - Celina de Almeida Lamas; Patrícia Gabriela Santana Alves; Luciano Nader de Araújo; Ana Beatriz de Souza Paes; Ana Claudia Cielo; Luciana Maciel de Almeida Lopes; André Longo Araújo de Melo; Thais Yokoyama; Clarice Pagani Savastano; Paula Gobi Scudeller; Carlos Carvalho (Journal of Medical Internet Research)