Alpha-defensin as a diagnostic tool in revision total knee arthroplasties with unexpected positive intraoperative cultures and unexpected culture negative intraoperative cultures. - Simon, Sebastian; Frank, Bernhard J. H.; Aichmair, Alexander; Dominkus, Martin; Mitterer, Jennyfer A.; Hartmann, Susana Gardete; Kasparek, Michael; Hofstaetter, Jochen G. (Knee Surgery, Sports Traumatology, Arthroscopy, 2023)