Editorial. TCM Zheng classification and clinical trials

According to the traditional Chinese medicine (TCM) theory, TCM Zheng (or pattern, syndrome) is an analysis on disease presentation by TCM practitioners. Zheng classification (Bian Zheng) is a traditional diagnostic method to categorize patients’ syndromes based on their presented conditions. Currently, combination of Zheng classification and biomedical diagnosis becomes a common model in TCMdiagnostics in clinical practice. Clinical treatments of a patient rely on the classification of a specificTCMZheng. This special issue collects articles describing the clinical trials with TCMZheng classification, Zheng classification methodology from clinical data, systematic reviews on clinical studies using Zheng classification, and the clinical pharmacological evaluation on TCM interventions using the omics platforms as well as bioinformatics