[1] Barnes Jewish Hosp, Dept Surg, St Louis, MO 63110 USA
[2] Barnes Jewish Hosp, Dept Neurosurg, St Louis, MO 63110 USA
[3] Barnes Jewish Hosp, Dept Surg Serv, St Louis, MO 63110 USA
[4] Washington Univ, Sch Med, Div Publ Hlth Sci, St Louis, MO 63110 USA
[5] Washington Univ, Sch Med, Dept Surg, St Louis, MO 63110 USA
[6] Washington Univ, Sch Med, Div Infect Dis, Dept Med, St Louis, MO 63110 USA
[7] Washington Univ, Sch Med, Dept Neurosurg, St Louis, MO 63110 USA
[8] Washington Univ, Sch Med, Alvin J Siteman Canc Ctr, St Louis, MO 63110 USA