Moatshe, G., E. R. Morris, M. E. Cinque, C. Pascual-Garrido, J. Chahla, L. Engebretsen, and R. F. Laprade. “Biological Treatment of the Knee With Platelet-Rich Plasma or Bone Marrow Aspirate Concentrates”. Acta Orthopaedica, vol. 88, no. 6, Nov. 2017, pp. 670-4, doi:10.1080/17453674.2017.1368899.