[1] Imperial Coll London, Royal Brompton Hosp, Sydney St, London SW3 6HP, England
[2] Volgograd State Med Univ, Volgograd Reg Cardiol Ctr, 106 Univ Sky Prospect, Volgograd 400008, Russia
[3] Univ Antioquia, Clin Cardio VID, Calle 78 B 75,21, Medellin, Antioquia, Colombia
[4] Univ Nova Lisboa, Heart Failure Unit, S Francisco Xavier Hosp, Ctr Hosp Lisboa Ocidental,Fac Ciencias Med, Lisbon, Portugal
[5] Univ Nova Lisboa, NOVA Med Sch, Fac Ciencias Med, Lisbon, Portugal
[6] Natl Heart Ctr Singapore, Heart Failure Programme, 5 Hosp Dr, Singapore 169609, Singapore
[7] Mexican Inst Social Secur, Div Heart Failure & Cardiac Transplantat, Cardiol Hosp, Natl Med Ctr Siglo 21, 330 Cuauhtemoc Ave, Mexico City 06720, DF, Mexico
[8] Univ Estado Rio de Janeiro, Sch Med Sci, Rua Voluntarios Patria,445 Suites 1401-02, BR-22270000 Rio De Janeiro, RJ, Brazil
[9] ICBA, Cardiol Clin, Blanco Encalada 1543, RA-1428 Buenos Aires, DF, Argentina
[10] Hosp & Clin DIME, 2901 Ave Ucrania, Tegucigalpa Dc Fm 1101, Honduras
[11] Univ Panama, Complejo Hosp Metropolitano Dr Arnulfo Arias Madr, Via Transistmica Panama, Panama City, Panama
[12] Calle 7 1678,Entre Ave 16 & 18, San Jose, Costa Rica
[13] Univ West Indies, Dept Med, Kingston 7, Jamaica