The efficacy of calcitriol therapy in the management of bone loss and fractures: a qualitative review - Peppone, L J; Hebl, S; Purnell, J Q; Reid, M E; Rosier, R N; Mustian, K M; Palesh, O G; Huston, A J; Ling, M N; Morrow, G R (Osteoporos Int, 2010)