Fig. 1From: A new single nucleotide polymorphism affects the predisposition to thoracic ossification of the posterior longitudinal ligamentPlasma COL6A1 ELISA. The plasma COL6A1 level of T-OPLL patients with rs201153092A mutation was significantly higher than T-OPLL patients carrying the rs201153092G site. ***P < 0.001Back to article page