[1] Univ Arkansas Med Sci, Dept Microbiol & Immunol, Little Rock, AR 72205 USA
[2] Univ Arkansas Med Sci, Dept Surg, Little Rock, AR 72205 USA
[3] Univ Arkansas Med Sci, Dept Pathol, Little Rock, AR 72205 USA
[4] Nevada Canc Inst, Las Vegas, NV USA
[5] Cent Arkansas Vet Healthcare Syst, Surg Serv, Little Rock, AR USA