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(A) Flowchart of Raman spectroscopy clinical trial selection, (B) characterization of study types of registered Raman spectroscopy clinical trials (R-RSCTs), (C) phase distribution of R-RSCTs, (D) disease classification of R-RSCTs according to physiological systems, and (E) the Sankey diagram of physiological systems, in vivo/in vitro, and sample types in R-RSCTs.
