| [1] | 
																						 
											  Hølen, J.C.; Lydersen, S.; Klepstad, P.; Loge, J.H.; Kaasa, S. The brief pain inventory: pain’s interference with functions is different in cancer pain compared with noncancer chronic pain. Clin. J. Pain.  2008, 24, 219–225. 
											 											 | 
										
																													
																						| [2] | 
																						 
											  Swarm, R.A.; Abernethy, A.P.; Anghelescu, D.L.; Benedetti, C.; Buga, S.; Cleeland, C.; de Leon-Casasola, O.A.; Eilers, J.G.; Ferrell, B.; Green, M.; Janjan, N.A.; Kamdar, M.M.; Levy, M.H.; Lynch, M.; McDowell, R.M.; Moryl, N.; Nesbit, S.A.; Paice, J.A.; Rabow, M.W.; Syrjala, K.L.; Urba, S.G.; Weinstein, S.M.; Dwyer, M.; Kumar, R. Adult cancer pain. J. Natl. Compr. Cancer Netw. 2013, 11, 992–1022. 
											 											 | 
										
																													
																						| [3] | 
																						 
											  Rao, X.; Wang, Ch.L.; Xu, X.W.; Huang, P.F.; Wang, H.; Lin, L. Meta-analysis of the clinical efficacy and safety of oxycodone and morphine in cancer pain treatment. J. Chin. Pharm. Sci. 2016, 5, 387–394. 
											 											 | 
										
																													
																						| [4] | 
																						 
											  Afsharimani, B.; Kindl, K.; Good, P.; Hardy, J. Pharmacological options for the management of refractory cancer pain—what is the evidence? Support. Care Cancer. 2015, 23, 1473–1481. 
											 											 | 
										
																													
																						| [5] | 
																						 
											  Vayne-Bossert, P.; Afsharimani, B.; Good, P.; Gray, P.; Hardy, J. Interventional options for the management of refractory cancer pain—what is the evidence? Support. Care Cancer. 2016, 24, 1429–1438. 
											 											 | 
										
																													
																						| [6] | 
																						 
											  Myers, J.; Chan, V.; Jarvis, V.; Walker-Dilks, C. Intraspinal techniques for pain management in cancer patients: a systematic review. Support. Care Cancer. 2010, 18, 137–149. 
											 											 | 
										
																													
																						| [7] | 
																						 
											  Currow, D.C.; Spruyt, O.; Hardy, J. Defining refractory pain in cancer for clinicians and researchers. J. Palliat. Med. 2012, 15, 5–6. 
											 											 | 
										
																													
																						| [8] | 
																						 
											  Luo, L.; Luo, X.L. The clinical observation on the treatment of cancerous pain with external application by Detumescence I. Hubei J. Tradit. Chin. Med. 2010, 5, 48. 
											 											 | 
										
																													
																						| [9] | 
																						 
											  Yang, C.D. The effect of Xiaozhong No.1 relieving cancerous pain. Chin. Clin. Nurs. 2016, 4, 351–353. 
											 											 | 
										
																													
																						| [10] | 
																						 
											  Li, C.Y.; Luo, X.L.; Wang, Q.W.; Zou, S.X.; Zhao, J.L. Clinical research of Jianzhongxiao cataplasm in treatment of cancer pain. J. Hubei Univ. Chin. Med. 2016, 3, 87–89. 
											 											 | 
										
																													
																						| [11] | 
																						 
											  Sun, W.J.; Jin, S.; Duan, X.Y.; Yan, B.; Bai, S.X.; Li, C.Y.; Jiang, N. Study on volatile fingerprinting of Xiaozhong Ointment No. 1 by HS-GC-MS technology. J. Hunan Univ. Chin. Med. 2019, 4, 485–488. 
											 											 | 
										
																													
																						| [12] | 
																						 
											  Sun, W.J.; Jin, S.; Bai, S.X.; Li, C.Y.; Jiang, N.; Duan, X.Y.; Zhou, C.H. Study on HPLC fingerprinting of Xiaozhong Ointment No. 1. West China J. Pharm. Sci. 2019, 6, 623–626. 
											 											 | 
										
																													
																						| [13] | 
																						 
											  Zhang, L.; Li, X.Y.; Xu, S.F.; Chen, F.Y.; Ye, Y.P. Determination of cynanchogenin and caudatin in cynanchum otophyllum scheid by HPLC under double UV wavelengths. Chin. J. Mod. Appl. Pharm. 2014, 3, 317–319. 
											 											 | 
										
																													
																						| [14] | 
																						 
											  Yin, X.; Ding, Y.F.; Shao, J.Z.; Wang, M.L.; Zhang, T.; Zhuang, Z.R.; Peng, Y.R. Research progress on cynanchi bungei radix. Chin. Tradit. Herb. Drugs. 2019, 4, 992–1000. 
											 											 | 
										
																													
																						| [15] | 
																						 
											  Zou, J.P.; Ran, C.; Liu, Y.; You, G.X.; Hou, K.; Wu, W. Research progress on antitumor activities of C21 steroidal glycosides of cynanchi fungei radix. Chin. Tradit. Herb. Drugs. 2019, 3, 785–792. 
											 											 | 
										
																													
																						| [16] | 
																						 
											  Fei, H.R. Ph.D. thesis, Isolation and antitumor activity of caudatin from the root of cynanchum bungei. Shandong Univ. Chin. Med. 2015. 
											 											 | 
										
																													
																						| [17] | 
																						 
											  Zhang, X.; Gao, Z.P. Research progress on ferulic acid. Mod. Chin. Med. 2020, 1, 138–147. 
											 											 | 
										
																													
																						| [18] | 
																						 
											  Lv, W.H.; Zhang, L.; Wu, S.J.; Chen, S.Z.; Zhu X.B.; Pan, J.C. Analgesic effect of ferulic acid on CCI mice: behavior and neurobiological analysis. China J. Chin. Mater. Med. 2013, 21, 3736–3741. 
											 											 |