Bark, S., Piontek, T., Behrens, P., Mkalaluh, S., Varoga, D., & Gille, J. (2014). Enhanced microfracture techniques in cartilage knee surgery: Fact or fiction? World Journal of Orthopedics, 5(4), 444-9. https://doi.org/10.5312/wjo.v5.i4.444 (Original work published 2014)