[1] Virginia Commonwealth Univ, Dept Pharmacotherapy & Outcomes Sci, Richmond, VA 23284 USA
[2] Virginia Commonwealth Univ, Dept Neurosurg, Richmond, VA USA
[3] Washington Univ, Barnes Jewish Hosp, Dept Clin Pharm, St Louis, MO USA
[4] Univ Pittsburgh, Sch Med, Dept Crit Care Med, Dept Neurol & Neurosurg, Pittsburgh, PA USA