Considerations of growth factor and material use in bone tissue engineering using biodegradable scaffolds in vitro and in vivo by Marshall, KM, Wojciechowski, JP, Jayawarna, V, Hasan, A, Echalier, C, Øvrebø, Ø, Yang, T, Zhou, K, Kanczler, JM, Mata, A, Salmeron-Sanchez, M, Stevens, MM, Oreffo, ROC