1. Department of Mycobacteriology, United Laboratories, Tartu University Hospital, Tartu, Estonia, Department of Pulmonary Medicine, University of Tartu, Tartu, Estonia
2. Public Health England, London, UK
3. Public Health Agency of Sweden, Stockholm, Sweden
4. European Centre for Disease Prevention and Control, Solna, Sweden
5. Public Health England, London, UK, Department of Infectious Diseases and Immunity, Imperial College, London, UK