Usability of an Intelligent Virtual Assistant for Promoting Behavior Change and Self-Care in Older People with Type 2 Diabetes. - João Balsa; Isa Brito Félix; Ana Paula Cláudio; Maria Beatriz Carmo; Isabel Costa e Silva; Ana Santos Guerreiro; Maria Guedes; Adriana Henriques; Mara Pereira Guerreiro (J. Medical Syst., 2020)