1 Research, Central Texas Veterans Health Care System, USA; Department of Medicine, Texas A&M Health Science Center, College of Medicine, USA.
2 Research, Central Texas Veterans Health Care System, USA; Department of Medicine, Texas A&M Health Science Center, College of Medicine, USA; Scott & White Digestive Disease Research Center, Scott & White, USA; Academic Research Integration, Baylor Scott & White Healthcare, Temple, TX 76504, USA.
3 Research, Central Texas Veterans Health Care System, USA; Department of Medicine, Texas A&M Health Science Center, College of Medicine, USA; Scott & White Digestive Disease Research Center, Scott & White, USA.
4 Research, Central Texas Veterans Health Care System, USA; Department of Medicine, Texas A&M Health Science Center, College of Medicine, USA; Scott & White Digestive Disease Research Center, Scott & White, USA. Electronic address: galpini@medicine.tamhsc.edu.