title: A response to comments by Dr. Manchikanti and Dr. Hirsch.
authors.affiliation: Department of Orthopedic Surgery, Vanderbilt University Medical Center, Vanderbilt Health One Hundred Oaks 719 Thompson Lane, Suite 23108, Nashville, TN 37204-7900, USA.
authors.forename: Clinton J
authors.initials: CJ
authors.lastname: Devin
authors.affiliation: Department of Neurological Surgery, Vanderbilt University Medical Center, Vanderbilt Health One Hundred Oaks 719 Thompson Lane, Suite 23108, Nashville, TN 37204-7900, USA.
authors.forename: Ahilan
authors.initials: A
authors.lastname: Sivaganesan