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Past Fellows

Brandon Clifford Chapman, MD
Colon and Rectal Fellow
08/01/2019 - 07/31/2020
Medical School: University of Vermont Larner College of Medicine
Residency: University of Colorado Denver School of Medicine
Practice: UC Anschutz Medical Campus, Academic Practice, Univeristy of Colorado, Aurora, CO

Gregory Mark Quatrino, MD
Colon and Rectal Fellow
08/01/2017 - 07/31/2018
Medical School: Ross University School of Medicine, Dominica, West Indies
Residency: University of South Alabama, Mobile, AL
Practice: University of South Alabama, Mobile, AL

Stephen Keith Hollister, MD
Colon and Rectal Fellow
08/01/2016 - 07/31/2017
Medical School: Quillen College of Medicine, East Tennessee State University, Johnson City, TN 
Residency: Indiana University SOM, Indianapolis, IN
Practice: Tristar Centennial, Colon Rectal Surgery Associate, Private Practice, Nashville, TN 

Elizabeth Norman McKeown, MD
Colon and Rectal Fellow
07/01/2015 - 6/30/2016
Medical School: Medical University of South Carolina, Charleston, SC
Residency: Swedish Medical Center, First Hill Surgery Program, Seattle, WA
Practice: Novant Health, Charlotte, NC

Kristin Chakarian Turza, MD
Colon and Rectal Fellow
07/01/2014 - 06/30/2015
Medical School: George Washington University School of Medicine, Washington, DC
Residency: University of Virginia Health System, Charlottesville, VA
Practice: Augusta Health Surgery, Fishersville, VA

Steven James Porbunderwala, MD
Colon and Rectal Fellow
07/01/2013 - 06/30/2014
Medical School: Temple University School of Medicine, Philadelphia, PA
Residency: Morristown Medical Center, Morristown, NJ
Practice: Summitt Medical Group, Florham Park, NJ 

Eric Charles Nelson, MD
Colon and Rectal Fellow
07/01/2012 - 06/30/2013
Medical School: Loma Linda University School of Medicine, Loma Linda, CA
Residency: UC Davis School of Medicine, Sacramento, CA
Practice: University of Tennessee, College of Medicine, Chattanooga, TN

John Henry Ashcraft, DO
Colon and Rectal Fellow
07/01/2011 - 06/30/2012
Medical School: Kansas City University Medicine and Biosciences
College of Osteopathic Medicine, Kansas City, KS
Residency: University of Kentucky, Lexington, KY
Practice: University of Kansas Medical Center, Kansas City, KS 

Last Published: Apr 16, 2021