[1] Univ Texas, Hlth Sci Ctr, S Texas Vet Healthcare Syst, Dept Gen Dent, San Antonio, TX 78229 USA
[2] Univ Texas, Hlth Sci Ctr, S Texas Vet Healthcare Syst, Dept Radiat Oncol, San Antonio, TX 78229 USA
[3] Univ Texas, Hlth Sci Ctr, S Texas Vet Healthcare Syst, Dept Med, San Antonio, TX 78229 USA
[4] Univ Texas, Hlth Sci Ctr, S Texas Vet Healthcare Syst, Dept Pathol, San Antonio, TX 78229 USA