Results of the intraoperative alpha defensin lateral flow test in the second stage of revision hip arthroplasty by Valery Yu. Murylev, Javad Parvizi, Alexander I. Rudnev, Grigory A. Kukovenko, Pavel M. Elizarov, Aleksey V. Muzychenkov, Semen S. Alekseev, Dmitriy O. Golubkin, Konstantin G. Yakovlev, Anastasia O. Ugolnikova