Richard ZuWallack1, Cristóbal Esteban2. 1. Pulmonary and Critical Care, St Francis Hospital, Hartford, CT, USA rzuwalla@stfranciscare.org. 2. Pneumology Dept and Red de Investigación en Servicios Sanitarios y Enfermedades Crónicas, Hospital Galdakao-Usansolo, Galdakao, Spain.
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