| Affiliation: | 1. Division of Hospital Medicine, University of Texas School of Medicine in San Antonio, TX 78229;2. Division of Pulmonary and Critical Care Medicine, University of Texas School of Medicine in San Antonio, TX 78229;3. Section of Pulmonary and Critical Care Medicine, South Texas Veterans Health Care System, San Antonio, TX 78229;4. Department of Oral & Maxillofacial Surgery, Massachusetts General Hospital, Harvard School of Dental Medicine, Boston, MA 02114;5. Department of Epidemiology & Biostatistics, University of Texas Health Science Center, San Antonio, TX 78229;1. Barts and the London School of Anaesthesia, The Royal London Hospital, Whitechapel, London, UK;2. William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, London, UK;3. Department of Anaesthesia and Critical Care, Queen Elizabeth Hospital, King''s Lynn, UK |
