Affiliation: | 1. Department of Anesthesiology, University of Alabama at Birmingham, 804 Jefferson Tower, 619 South 19th Street, Birmingham, AL 35249-6810, USA;2. Critical Care Division, Department of Anesthesiology, University of Alabama at Birmingham, 804 Jefferson Tower, 619 South 19th Street, JT926, Birmingham, AL 35249-6810, USA |