Graft maturity of the reconstructed anterior cruciate ligament 6 months postoperatively: a magnetic resonance imaging evaluation of quadriceps tendon with bone block and hamstring tendon autografts - Ma, Y; Murawski, C D; Rahnemai-Azar, A A; Maldjian, C; Lynch, A D; Fu, F H (Knee Surg Sports Traumatol Arthrosc, 2015)