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Ahmed S BaHammam1â 3 1Editor-in-Chief Nature and Science of Sleep; 2Department of Medicine, University Sleep Disorders Center and Pulmonary Service, King Saud University, Riyadh, Saudi Arabia; 3King Saud University Medical City, Riyadh, Saudi ArabiaCorrespondence: Ahmed S BaHammam, Professor of Medicine, University Sleep Disorders Center, Department of Medicine, College of Medicine, King Saud University, Box 225503, Riyadh, 11324, Saudi Arabia, Tel +966-11-467-9495, Fax +966-11-467-9179, Email ashammam2@gmail.com
Ahmed S. BaHammam (Fri,) studied this question.