[1] MERSKEY H，ALBE-FESSARD D，BONICA J J，et al. Pain terms：a list with definitions and notes on usage. Recommended by the IASP subcommittee on taxonomy. Pain，1979，6：249-252.

[2] MERSKEY H，BOGDUK N. Classification of chronic pain. In：Merskey H，Bogduk N，editors. Part Ⅲ：Pain terms，a current list with definitions and notes on usage. IASP task force on taxonomy. Seattle：IASP Press，1994，209-214.

[3] LOESER J D，TREEDE R D. The Kyoto protocol of IASP basic pain terminology. Pain，2008，137（3）：473-477.

[4] WILLIAMS A C，CRAIG K D. Updating the definition of pain. Pain，2016，157（11）：2420-2423.

[5] TREEDE R D，JENSEN T S，CAMPBELL J N，et al. Neuropathic pain：redefinition and a grading system for clinical and research diagnostic purposes. Neurology，2008，70：1630-1635.

[6] WOOLF C J. Pain：moving from symptom control toward mechanism-specific pharmacologic management.Ann Intern Med，2004，140：441-451.

[7] GATCHEL R J，BEVERS K，LICCIARDONE J C，et al. Transitioning from acute to chronic pain：an examination of different trajectories of low-back pain. Healthcare（Basel），2018，6（2）：E48.