[1] Desert Reg Med Ctr, Dept Neurosurg, 1150 N Indian Canyon Dr, Palm Springs, CA 92262 USA
[2] Univ Anahuac Queretaro, Sch Med, Santiago De Queretaro, Mexico
[3] Western Univ Hlth Sci, Coll Osteopath Med, Pomona, CA USA
[4] Univ Texas Med Branch, Sch Med, Galveston, TX 77555 USA
[5] Univ Pikeville, Kentucky Coll Osteopath Med, Pikeville, KY USA
[6] Univ Michigan, Dept Mol & Integrat Physiol, Ann Arbor, MI 48109 USA
[7] Michigan State Univ, Coll Osteopath Med, E Lansing, MI 48824 USA