[1] Minneapolis VA Med Ctr, Minneapolis, MN 55417 USA
[2] Univ Minnesota, Minneapolis, MN USA
[3] Max Von Pettenkofer Inst Hyg & Med Microbiol, Munich, Germany
[4] Ctr Hosp Univ Purpan, Toulouse, France
[5] Hop Morvan, Brest, France
[6] HaEmek Med Ctr, Afula, Israel
[7] Techn Sch Med, Afula, Israel