[1] Maria Ferrer Hosp, Ciudad Autonoma Buenos Ai, Argentina
[2] Inst Nacl Enfermedades Respiratorias Ismael Cosio, Mexico City, Mexico
[3] Fdn Neumol Colombiana, Bogota, Colombia
[4] Clin Univ Union Med Norte, Santo Domingo, Dominican Rep
[5] Ctr Med Cardioneurooftalmol & Trasplante, Santo Domingo, Dominican Rep
[6] Inst Nacl Torax, Santiago, Chile
[7] Clin Sur, La Paz, Bolivia