aDivision of Pain Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital, Boston, MA, USA
bDepartment of Psychiatry, Harvard Medical School, Boston, MA, USA
Corresponding author. Address: Division of Pain Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital, 21 Autumn St, Boston, MA 02215, USA. Tel.: (617) 919-4677; fax: (781) 216-1652. E-mail address: [email protected] (L. E. Simons).
Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.
Received September 24, 2014
Received in revised form December 19, 2014
Accepted January 09, 2015