1. McGovern Medical School at UTHealth, Houston, Texas (N.H.D., O.A.O., K.B., N.B.L., J.L.H.)
2. Baylor College of Medicine, Houston, Texas (M.L.)
3. Dell Medical School at the University of Texas, Austin, Texas (A.B.H.)
4. University of Houston, HCA Kingwood, Kingwood, Texas (M.K.L.).