Valleala, Heikki V, Tom O Böhling, and Yrjö T Konttinen. 2007. “Regression of Heterotopic Ossification After Starting warfarin—an Effect Mediated by Inhibition of γ-Carboxylation of osteocalcin?—a Case Report”. Acta Orthopaedica 78 (5):693-95. https://doi.org/10.1080/17453670710014419.