1 Division of Minimally Invasive and Elective General Surgery, Department of Surgery, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA.
2 Gastroenterology, Memorial Hermann Health System, Houston, Texas, USA.
3 Interventional Radiology, Radiology Partners, Houston, Texas, USA.
4 Michael E DeBakey Institute of Comparative Cardiovascular Science and Biomedical Devices, Texas A&M University, College Station, Texas, USA.