Schmidt, Steen Asmus, and Per Kjérsgaard-andersen. 1988. “Indomethacin Inhibits the Recurrence of Excised Ectopic Ossification After Hip Arthroplasty: A 3–4 Year Follow-up of 8 Cases”. Acta Orthopaedica 59 (5):593-93. https://doi.org/10.3109/17453678809148794.