[1] Univ Nova Lisboa, Serv Med 3, Clin Insuficiencia Cardiaca, Lisbon, Portugal
[2] Univ Nova Lisboa, Hosp Sao Francisco Xavier, Ctr Hosp Lisboa Ocidental, Hosp Dia,NOVA Med Sch,Fac Ciencias Med, Lisbon, Portugal
[3] Univ Lisbon, Ctr Hosp Lisboa Norte, Hosp Santa Maria, Serv Cardiol,Fac Med,CCUL, Lisbon, Portugal
[4] Ctr Hosp Lisboa Ocidental, Hosp Santa Cruz, Serv Cardiol, Lisbon, Portugal
[5] Ctr Hosp & Univ Coimbra, Hosp Univ Coimbra, Serv Cardiol, Coimbra, Portugal
[6] Ctr Hosp Leiria, Serv Cardiol, Leiria, Portugal
[7] Univ Porto, Fac Med, Clin Insuficiencia Cardiaca & Transplante, Ctr Hosp Sao Joao,Serv Cardiol, Porto, Portugal