title: Osteonecrosis of the knee.
authors.affiliation: University of Pennsylvania, Department of Orthopaedic Surgery, Philadelphia 19104.
authors.forename: P A
authors.initials: PA
authors.lastname: Lotke
authors.forename: M L
authors.initials: ML
authors.lastname: Ecker
mesh_terms: D006801:Humans; D007719:Knee Joint; D010020:Osteonecrosis / Q000175:diagnosis / Q000209:etiology / Q000628:therapy; D011379:Prognosis; D013977:Tibia