Myelofibrosis and osteosclerosis do not develop in VDR^−/− mice transplanted with VDR^−/− BM. (A-C) Survival (A), H&E staining of femur sections (4 months after transplantation) (B), and blood cell counts (C) in VDR^+/+ and VDR^−/− recipient mice transplanted with VDR^−/− BM. Scale bars, 500 μm (black) and 100 μm (white). Representative pictures or combined data of at least 3 independent experiments are shown. Data are represented as mean plus or minus SEM. *P < .05 (Kaplan-Meier analysis and Student t test).