Outcomes After Isolated Medial Patellofemoral Ligament Reconstruction for Recurrent Patellar Instability: Influence of Persistent Postoperative Apprehension and J-Sign. - Dennis, Elizabeth R.; Ammerman, Brittany M.; Nguyen, Joseph T.; Marmor, William A.; Pahapill, Natalie K.; Propp, Bennett E.; Gruber, Simone; Brady, Jacqueline M.; Shubin Stein, Beth E. (American Journal of Sports Medicine, 2025)