1. Texas A&M University, Corpus Christi, 1177 West Wheeler Avenue, Suite 1, Aransas Pass, TX 78336, USA
2. Bay Area Medical Center, University of North Texas, 7101 S Padre Island Drive, Corpus Christi, TX 78402, USA
3. Pulmonary Associates of Corpus Christi, 1177 West Wheeler Avenue, Suite 1, Aransas Pass, TX 78336, USA
4. The University of Texas Health Science Center, University General Hospital, 7501 Fannin Street, Houston, TX 77054, USA