[1] Houston VAMC, Houston, TX USA
[2] Baylor Coll Med, Houston, TX 77030 USA
[3] UMDNJ, Newark, NJ USA
[4] Univ Calif Davis, Sacramento, CA 95817 USA
[5] Yale Univ, New Haven, CT USA
[6] MSUCHM, E Lansing, MI USA
[7] MSUCOM, E Lansing, MI USA
[8] Univ Massachusetts, Worcester, MA 01605 USA
[9] Univ Rochester, Rochester, NY USA
[10] Univ Florida, Gainesville, FL USA
[11] Penn State Univ, Hershey, PA USA
[12] Indiana Univ, Indianapolis, IN 46204 USA