Recovery after unilateral knee replacement due to severe osteoarthritis and progression in the contralateral knee: a randomised clinical trial comparing daily 2000 IU versus 800 IU vitamin D
Heike A Bischoff-Ferrari, E John Orav, Andreas Egli, Bess Dawson-Hughes, Karina Fischer, Hannes B Staehelin, Rene Rizzoli, Juerg Hodler, Arnold von Eckardstein, Gregor Freystaetter, Ursina Meyer, Thomas Guggi, Peter Burckhardt, Simeon Schietzel, Patricia Chocano-Bedoya, Robert Theiler, Walter C Willett, David Felson
RMD Open Jul 2018, 4 (2) e000678; DOI: 10.1136/rmdopen-2018-000678