About the Authors
- Francis Drobniewski, Yanina Balabanova, Vladyslav Nikolayevskyy
- Health Protection Agency Mycobacterium Reference Unit and Clinical TB and HIV Group, Institute of Cell and Molecular Sciences, Barts and The London School of Medicine and Dentistry, Queen Mary College, University of London, London, United Kingdom
- Yanina Balabanova, Elena Zakamova, Ivan Fedorin
- Samara Oblast Tuberculosis Service, Samara, Russian Federation
The authors have declared that no competing interests exist. Gamma-interferon tests were purchased from Cellestis (http://www.cellestis.com); Cellestis was not involved in the planning, analysis, or preparation of the manuscript.
FD participated in acquisition of funding, design of the study, its supervision, and gave final approval of the version to be published. YB participated in the design of the study, its coordination, acquisition of data, statistical analysis, and drafted the manuscript; EZ carried out laboratory work and revised the manuscript. VN supervised laboratory work and participated in data analysis and critical revision of the manuscript. IF participated in administration of the study, its design, and revision of the manuscript. All authors read and approved the final manuscript.