Article History
Received: 4 November 2018
Accepted: 11 April 2019
First Online: 17 April 2019
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: This study was approved by Ethical Committee of Novosibirsk Research TB Institute, Novosibirsk, Russian Federation.
: As the study was retrospective, informed consent was not required.