1. Austrian Association for Quality Assurance and Standardization of Medical and Diagnostic Tests (ÖQUASTA) , Vienna , Austria
2. Center for Virology , Medical University of Vienna , Vienna , Austria
3. Armament and Defence Technology Agency , NBC & Environmental Protection Technology Division, Vienna , Austria
4. CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences , Vienna , Austria
5. Karl Landsteiner Institute for Clinical Risk Management , Vienna , Austria
6. Federal Ministry of Social Affairs, Health, Care and Consumer Protection , Vienna , Austria
7. Laboratoire National de Métrologie et d’Essais (LNE) , Paris , France