Michael E. DeBakey VA Medical Center, Houston, Texas, United States
Saint Petersburg Pavlov State Medical University, Saint Petersburg, Russian Federation
Scott & White Hospital and Clinic, Waco, Texas, United States
George Washington University Medical Center, Washington, D.C., District of Columbia, United States
Baylor College of Medicine, Houston, Texas, United States
Texas Children's Hospital, Houston, Texas, United States
Texas Children's Hospital, Houston, Texas, United States
The Methodist Hospital, Houston, Texas, United States
The Methodist Hospital, Houston, Texas, United States
Texas Children's Hospital, Houston, Texas, United States
Houston Methodist Hospital, Houston, Texas, United States
Texas Children's Hospital, Houston, Texas, United States
The Methodist Hospital, Houston, Texas, United States