1 Department of Information Technology, Uppsala University, Uppsala, Sweden.
2 Telehealth Center and Cardiology Service, Hospital das Clínicas, Universidade Federal de Minas Gerais, Av. Professor Alfredo Balena 110, 1° Andar, Ala Sul, Sala 107, Belo Horizonte MG 30130-100, Brazil.
3 Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.