[1]  Zhang F, Wu C, Jia C, Gao K, Wang J, Zhao H, et al. Artificial intelligence based discovery of the association between depression and chronic fatigue syndrome. J Affect Disorders 2019;250:380–90. link1

[2]  Wang Z, Li L, Song M, Yan J, Shi J, Yao Y. Evaluating the traditional Chinese medicine (TCM) officially recommended in China for COVID-19 using ontology-based side-effect prediction framework (OSPF) and deep learning. J Ethnopharmacol 2021;272:113957. link1

[3]  Sun XL, Jiang WW, Yu DL, Lin X, Ding BG, Liu MA. Research on basic path and inherent law in the process of Chinese medicine treatment based on syndrome differentiation. J Tradit Chin Med 2016;57(4):289–94. Chinese. link1

[4]  Wang YY. Suggestions on improving the system of traditional Chinese medicine syndrome differentiation. J Tradit Chin Med 2004;45(10):729–31. Chinese. link1

[5]  Li S. Discussion on the characteristics of TCM syndromes from the concepts of dimension and ranks: approaches to the standardization of TCM syndromes. J Beijing University Tradit Chin Med 2003;26(3):1–4. Chinese. link1

[6]  Zhang ZB, Wang YY. Establishment of a new TCM syndrome differentiation system. J Beijing University Tradit Chin Med 2005;28(1):1–3. Chinese. link1

[7]  Zhang ZB, Wang YY. Research on TCM syndrome nomenclature and classification: review and hypothesis. J Beijing University Tradit Chin Med 2003;26(2):1–5. Chinese. link1

[8]  Zhu WF. Standardization research of differentiation system of symptoms and signs and ‘‘syndrome” in TCM. Tianjin J Tradit Chin Med 2002;19(5):1–4. Chinese. link1

[9]  Wang J, Tang YL, He QY, Xiong XJ. Thinking of prescriptions corresponding to syndromes in construction of syndrome differentiation system. J Tradit Chin Med 2009;24(7):837–9. Chinese. link1

[10]  Wang J, Li J, Yao KW, Zhong JB. Study on syndrome elements and their combination laws in patients with angina pectoris. J Tradit Chin Med 2007;48 (10):920–2. Chinese. link1

[11]  Li J, Wang J. Literature case analysis of 5099 cases of syndrome elements and syndrome combinations of angina pectoris of coronary heart disease. Chin J Basic Med Tradit Chin Med 2007;13(12):926–7. Chinese. link1

[12]  China Association of Chinese Medicine. Guidelines for diagnosis and treatment of stable angina pectoris of coronary heart disease (T/CACM1325–2019). J Tradit Chin Med 2019;60(21):1880–90. Chinese. link1

[13]  Zhang H, Ni W, Li J, Zhang J. Artificial intelligence-based traditional Chinese medicine assistive diagnostic system: validation study. JMIR Med Inform 2020;8(6):e17608. link1

[14]  Xu F, Xu ZX, Xu WJ, Wang YW, Liu T, Xia CM, et al. Classification of TCM syndromes in 835 cases of coronary heart disease: on the basis of Bayesian networks principle. Shanghai J Tradit Chin Med 2014;48(1):10–3. Chinese. link1

[15]  Zhang NL, Yuan S, Chen T, Wang Y. Statistical validation of traditional Chinese medicine theories. J Altern Complem Med 2008;14(5):583–7. link1

[16]  Hong YZ, Zhou CL, Zhang ZF, Xu JT. Selection of characteristic symptoms of chronic fatigue syndrome elements based on random forest method. J Tradit Chin Med 2010;7:634–8. Chinese. link1