title: Platelets in the synovial space.
mesh_terms: D001168:Arthritis / Q000209:etiology*; D001792:Blood Platelets; D006801:Humans; D010978:Platelet Factor 4 / Q000032:analysis; D013582:Synovial Fluid / Q000032:analysis / Q000166:cytology*
chemical_list: D010978:Platelet Factor 4