[1] Hosp Badalona Germans Trias & Pujol, Serv Cardiol, Badalona 08916, Spain
[2] Hosp Badalona Germans Trias & Pujol, Heart Failure Unit, Badalona 08916, Spain
[3] Autonomous Univ Barcelona, Dept Med, Barcelona, Spain
[4] Hosp Badalona Germans Trias & Pujol, Biochem Serv, Badalona 08916, Spain
[5] Univ Murcia, Dept Cardiol, Hosp Virgen de la Arrixaca, Dept Med, Murcia, Spain
[6] Hosp Clin Univ, Biochem Serv, Valencia, Spain
[7] Univ Valencia, Valencia, Spain
[8] Hosp Clin Univ, Serv Cardiol, Valencia, Spain
[9] Hosp Manises, Serv Cardiol, Valencia, Spain