[1] Hosp Univ Vall Hebron, Serv Cirugia Cardiaca, Barcelona, Spain
[2] Hosp Univ & Politecn La Fe, Serv Anestesiol Reanimac & Terapeut Dolor, Valencia, Spain
[3] Hosp Univ Vall Hebron, Serv Anestesiol Reanimac & Terapeut Dolor, Barcelona, Spain
[4] Hosp Univ Puerta Hierro, Serv Cirugia Cardiaca, Madrid, Spain
[5] Hosp Alvaro Cunqueiro Vigo, Serv Cirugia Cardiaca, Vigo, Spain
[6] Hosp Univ Canarias, Serv Cirugia Cardiaca, Santa Cruz De Tenerife, Spain
[7] Hosp Univ Miguel Servet, Serv Anestesiol Reanimac & Terapeut Dolor, Zaragoza, Spain
[8] Complejo Hosp Univ A Coruna, Serv Anestesiol Reanimac & Terapeut Dolor, La Coruna, Spain
[9] Hosp Alvaro Cunqueiro Vigo, Serv Anestesiol Reanimac & Terapeut Dolor, Vigo, Spain
[10] Hosp Univ Cent Asturias, Serv Anestesiol Reanimac & Terapeut Dolor, Oviedo, Spain
[11] Hosp Hospiten Rambla, Serv Cirugia Cardiaca, Tenerife, Spain
[12] Hosp Univ & Politecn La Fe, Serv Cirugia Cardiaca, Valencia, Spain
[13] Hosp Univ Carlos Haya, Serv Cirugia Cardiaca, Malaga, Spain
[14] Complejo Hosp Navarra, Serv Cirugia Cardiaca, Navarra, Spain
[15] Hosp Univ Valladolid, Serv Cirugia Cardiaca, Valladolid, Spain
[16] Hosp Univ Cent Asturias, Serv Cirugia Cardiaca, Asturias, Spain