Associations between serum biomarkers of cartilage metabolism and serum hyaluronic acid, with risk factors, pain categories, and disease severity in knee osteoarthritis: a pilot st... oleh Christos Papaneophytou, Ana Alabajos-Cea, Enrique Viosca-Herrero, Carme Calvis, Marta Costa, Andreas E. Christodoulides, Alexander Kroushovski, Alkis Lapithis, Vaia Maligianni Lapithi, Ioannis Papayiannis, Andreas Christou, Ramon Messeguer, Christoforos Giannaki, Kyriacos Felekkis