aDepartment of Anesthesiology, Perioperative and Pain Medicine, Division of Pain Medicine, Stanford University, Stanford, CA, USA
bDepartment of Neurology and Neurological Sciences, Stanford University, Stanford, CA, USA
cDepartment of Physiology, Northwestern University, Chicago, IL, USA
dDepartment of Medicine, David Geffen School of Medicine, Division of Digestive Diseases, University of California, Los Angeles, CA, USA
eDepartment of Radiology, University of Alabama at Birmingham, Birmingham, AL, USA
fDepartment of Anesthesiology, University of Michigan Ann Arbor, Ann Arbor, MI, USA
Corresponding author. Address: Department of Anesthesiology, Perioperative and Pain Medicine, Division of Pain Medicine, Stanford University, 1070 Arastradero Rd, Room 285, MC 5596, Palo Alto, CA 94304-1336, USA. Tel.: +650 498-6477; fax: +650 725-9642. E-mail address: [email protected] (S. C. Mackey).
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Received February 12, 2015
Received in revised form May 01, 2015
Accepted May 12, 2015