1. Department of Pulmonary Medicine, Corpus Christi Medical Center, Texas, USA
2. Texas A&M University, Bryan College Station, Texas, USA
3. Department of Internal Medicine, Corpus Christi Medical Center, Texas, USA
4. Department of Pulmonary and Critical Care, Corpus Christi Medical Center, Texas, USA
5. Academic Institute, Houston Methodist, Weill Cornell Medical College, USA
6. University of Texas Health Science Center at Houston, USA
7. Division of Pulmonary, Critical Care and Sleep Medicine, Texas A&M University, USA