Sandwich ELISA for the Quantification of Nucleocapsid Protein of SARS-CoV-2 Based on Polyclonal Antibodies from Two Different Species oleh Maja Mladenovic Stokanic, Ana Simovic, Vesna Jovanovic, Mirjana Radomirovic, Bozidar Udovicki, Maja Krstic Ristivojevic, Teodora Djukic, Tamara Vasovic, Jelena Acimovic, Ljiljana Sabljic, Ivana Lukic, Ana Kovacevic, Danica Cujic, Marija Gnjatovic, Katarina Smiljanic, Marija Stojadinovic, Jelena Radosavljevic, Dragana Stanic-Vucinic, Marijana Stojanovic, Andreja Rajkovic, Tanja Cirkovic Velickovic