1. WHO Collaborating Centre for Quality Assurance of Blood Products and In Vitro Diagnostic Devices, Paul Ehrlich Institute, Langen, Germany
2. Quality Control for Molecular Diagnostics, Glasgow, United Kingdom
3. Department of Medical Microbiology, Division of Clinical Virology, The University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
4. Essential Medicines and Health Products Department, World Health Organization, Geneva, Switzerland