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.