1. Iranian Center of Neurological Research, Neuroscience Institute, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran
2. Department of Pulmonary Critical Care, Brooke Army Medical Center, San Antonio, TX, USA
3. Department of Physical Medicine and Rehabilitation, University of Texas Health San Antonio, San Antonio, TX, USA
4. Department of Neurosurgery, Division of Neurocritical Care, University of Texas Health, San Antonio, TX, USA