[1] Old Dominion Univ, Coll Arts & Letters, Norfolk, VA USA
[2] Baylor Coll Med, Houston, TX 77030 USA
[3] Med Univ South Carolina, Dept Neurosurg, Charleston, SC USA
[4] Harvard Med Sch, Boston, MA USA
[5] Boston Childrens Hosp, Boston, MA USA
[6] GZA St Vincentius Hosp, Dept Emergency Med, Antwerp, Belgium