Zambonin, G., Grano, M., Greco, G., Oreffo, R. O. C., & Triffit, J. T. (1999). Hydroxyapatite coated with insulin-like growth factor 1 (IGF1) stimulates human osteoblast activity in vitro. Acta Orthopaedica, 70(2), 217–220. https://doi.org/10.3109/17453679909011266