Fig. 1From: Identification of the molecular mechanism and diagnostic biomarkers in the thoracic ossification of the ligamentum flavum using metabolomics and transcriptomicsa: The heatmap of metabolites detected by positive ion mode. b: The OPLS-DA model of positive ion mode; green dots represent the control group and blue dots represent the OTLF group. c: The heatmap of metabolites detected by negative ion mode. d: The OPLS-DA model of negative ion mode; green dots represent the control group and blue dots represent the OTLF groupBack to article page