[1] Columbia Univ, Dept Med, Div Cardiol, Med Ctr,New York Presbyterian Hosp, New York, NY USA
[2] Yale YNHH Ctr Outcomes Res & Evaluat, New Haven, CT USA
[3] Hosp Univ Araba, Dept Pneumonol, Alava, Spain
[4] Hosp Ramon & Cajal, Resp Dept, Madrid, Spain
[5] Univ Alcala IRYCIS, Med Dept, Madrid, Spain
[6] Hosp Univ La Paz, Dept Internal Med, Madrid, Spain
[7] Hop Rangueil, Dept Vasc Med, Toulouse, France
[8] Hosp Univ Virgen Rocio, Dept Pneumonol, Seville, Spain
[9] S&H Med Sci Serv, Madrid, Spain
[10] Meir Hosp, Dept Haematol, Kefar Sava, Israel
[11] Hosp Badalona Germans Trias & Pujol, Barcelona, Spain