Reference:
1. Corbett AH, Dana WJ, Fuller MA, Gallagher JC, Golembiewski JA, Gonzales JP, et al. Drug information handbook. 26th ed. Hudson, Ohio: Wolters kluwer, 2017-2018.
2. Benzon HT, Rathmell JP, Wu CL, Turk DC, Argoff CE, Hurley RW, editors. Practical Management of Pain, 5th edition. St. Louis Missour: Mosby, 2014.
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