Estrogen deficiency increases the ability of stromal cells to support murine osteoclastogenesis via an interleukin-1 and tumor necrosis factor-mediated stimulation of macrophage colony-stimulating factor production. - Kimble,R.B.; Srivastava,S.; Ross,F.P.; Matayoshi,A.; Pacifici,R. (J Biol Chem, 1996)