A biomarker of hypertrophic chondrocytes, type X collagen, completely distinguishes between OA and RA. (April 2018) - He, Y.; Manon-Jensen, T.; Arendt-Nielsen, L.; Pedersen, K.K.; Christiansen, T.; Samuels, J.; Abramson, S.; Karsdal, M.K.; Mukundan, A.; Bay-Jensen, A.C.