Absence of Proteoglycan 4 (<i>Prg4</i>) Leads to Increased Subchondral Bone Porosity Which Can Be Mitigated Through Intra‐Articular Injection of PRG4Saleem Abubacker, Roman Krawetz, Anchita Shonak et al.|Journal of Orthopaedic Research®|2019Cited by 28