[1] Indiana Univ Sch Med, Indianapolis, IN 46202 USA
[2] Louisiana Tech Univ, Ruston, LA 71270 USA
[3] Roudebush VA Med Ctr, Indianapolis, IN USA
[4] Indiana Univ Sch Med, Dept Biostat, Indianapolis, IN 46202 USA
[5] John D Dingell VA Med Ctr, Detroit, MI USA
[6] Wayne State Univ, Detroit, MI USA
[7] Samuel S Stratton VAMC, Albany, NY USA
[8] VA Boston HealthCare Syst, Boston, MA USA
[9] NYU, New York, NY USA
[10] VA Puget Sound Healthcare Syst, Seattle, WA USA
[11] Baylor Coll Med, Houston, TX 77030 USA
[12] James J Peters VA Med Ctr, Bronx, NY USA
[13] West Haven VA Med Ctr, West Haven, CT USA
[14] Denver VA Med Ctr, Denver, CO USA
[15] Brown Univ, Providence, RI 02912 USA
[16] White River Junct VA Med Ctr, White River Jct, VT USA
[17] Ann Arbor VA Healthcare Syst, Ann Arbor, MI USA
[18] New York VA Med Ctr, Northport, NY USA
[19] San Francisco VA Med Ctr, San Francisco, CA USA
[20] Nashville VA Med Ctr, Nashville, TN USA