[1] Univ Pittsburgh, Dept Phys Med & Rehabil, Pittsburgh, PA USA
[2] Safar Ctr Resuscitat Res, Pittsburgh, PA USA
[3] Univ Pittsburgh, Dept Crit Care Med, Pittsburgh, PA USA
[4] Univ Pittsburgh, Sch Publ Hlth, Dept Biostat, Pittsburgh, PA 15260 USA
[5] Univ Pittsburgh, Sch Publ Hlth, Dept Human Genet, Pittsburgh, PA 15260 USA
[6] Univ Pittsburgh, Dept Neurosci, Pittsburgh, PA USA