Seroprevalence of SARS-CoV-2 Antibodies and Associated Factors in Healthcare Workers before the Era of Vaccination at a Tertiary Care Hospital in Turkey oleh Meliha Cagla Sonmezer, Enes Erul, Taha Koray Sahin, Ipek Rudvan Al, Yasemin Cosgun, Gulay Korukluoglu, Humeyra Zengin, Gülçin Telli Dizman, Ahmet Cagkan Inkaya, Serhat Unal