Comparison of real-time and droplet digital PCR to detect and quantify SARS-CoV-2 RNA in plasma. - Tedim AP; Almansa R; Domínguez-Gil M; González-Rivera M; Micheloud D; Ryan P; Méndez R; Blanca-López N; Pérez-García F; Bustamante E; Gómez JM; Doncel C; et al. (European journal of clinical investigation, 2021)