Standardization of SARS-CoV-2 Cycle Threshold Values: Multisite Investigation Evaluating Viral Quantitation across Multiple Commercial COVID-19 Detection Platforms oleh Kenneth Gavina, Lauren C. Franco, Christopher M. Robinson, Weston Hymas, Guang-Sheng Lei, Will Sinclair, Tara Hall, John Carlquist, John-Paul Lavik, Christopher L. Emery, Phillip R. Heaton, David Hillyard, Bert K. Lopransi, Ryan F. Relich