The prevalence of intraarticular associated lesions after acute acromioclavicular joint injuries is 20%. A systematic review and meta-analysis - Ruiz Ibán, M.A.; Moreno Romero, M.S.; Diaz Heredia, J.; Ruiz Díaz, R.; Muriel, A.; López-Alcalde, J. (Knee Surgery, Sports Traumatology, Arthroscopy, 2021)