University of Nebraska Medical Center, Omaha, Nebraska, United States
Saint Elizabeth Regional Medical Center, Lincoln, Nebraska, United States
University of Nebraska Medical Center, Specialty Care Center, Omaha, Nebraska, United States
Advent Health, Greenwood Village, Colorado, United States
Florida Hospital Memorial Medical Center, Daytona Beach, Florida, United States
Florida Hospital DeLand, DeLand, Florida, United States
Temple University, Philadelphia, Pennsylvania, United States
Harbor-UCLA Medical Center, Torrance, California, United States
National Jewish Health, Denver, Colorado, United States
University of Nebraska Medical Center, Department of Ophthalmology and Visual Sciences, Omaha, Nebraska, United States
University of Nebraska Medical Center, Truhlsen Eye Institute, Omaha, Nebraska, United States
University of Nebraska Medical Center, Omaha, Nebraska, United States
University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States
Veterans Affairs Medical Center, Omaha, Omaha, Nebraska, United States
Unversity of Nebraska Medical Center, Omaha, Nebraska, United States