The impairment of osteogenesis in bone sialoprotein (BSP) knockout calvaria cell cultures is cell density dependent. oleh Guenaelle Bouet, Wafa Bouleftour, Laura Juignet, Marie-Thérèse Linossier, Mireille Thomas, Arnaud Vanden-Bossche, Jane E Aubin, Laurence Vico, David Marchat, Luc Malaval