Department of Pulmonary Diseases, Ibn Zohr Public Hospital, Guelma., Algeria
Director of MICU, Associated Director of Critical Care Medicine, and Associate Director of Pulmonary Medicine at Lenox Hill Hospital, New York, USA
Professor, Department of Pulmonary Medicine, Allergy, and Sleep Medicine, Hisar Intercontinental Hospital, Turkey
Associate Research Scientist, Department of Medicine (Pulmonary),Yale School of Medicine, USA
Medical Director, Pediatric Pulmonary Division and Cystic Fibrosis Center, Miller Children's Hospital, University of California, Irvine, USA
Associate Professor, Division of Pulmonary, Critical Care & Sleep Medicine, National Jewish Health, USA.
Director at Santa Paula cardiopulmonary rehabilitation center, Santa Paula Clinic, Costa Rica
Pulmonary and Critical Care, Geisinger Commonwealth School of Medicine Fellowship Medicine, Danville, USA
Associate Professor & Head, Pulmonary & Critical care Medicine, MIMSR Medical college, Latur, India
Assistant Professor, Department of Pulmonary Medicine & Sleep Disorders, All India Institute of Medical Sciences, New Delhi, India
Research instructor, Pulmonary medicine, University of Colorado Health Science Center, USA.
Professor and Chief, Department of Pulmonary Medicine, Fudan University affiliated teaching Hospital, Qingpu Central Hospital, Shanghai, China