Stimulation of a calcified cartilage connecting zone by GDF‐5‐augmented fibrin hydrogel in a novel layered ectopic in vivo model - Diederichs, Solvig; Hagmann, Sébastien; Lotz, Benedict; Seebach, Elisabeth; Richter, Wiltrud (Journal of biomedical materials research. Part B, Applied biomaterials, 2018)