Bone morphogenetic protein (BMP)-2 enhances the expression of type II collagen and aggrecan in chondrocytes embedded in alginate beads. - Gründer,T.; Gaissmaier,C.; Fritz,J.; Stoop,R.; Hortschansky,P.; Mollenhauer,J.; Aicher,W.K. (Osteoarthritis Cartilage, 2004)