1. Exercise Physiology, Memorial Hermann-Texas Medical Institute, The University of Texas Health Science Center at Houston, 6431 Fannin, Houston, TX 77030, USA
2. Lyndon B. Johnson General Hospital, The University of Texas Medical School at Houston, UT Annex-Room 104, 5656 Kelley Street Houston, TX 77026, USA
3. The University of Texas Medical School at Houston, 6431 Fannin, Houston, TX 77030, USA