Received: 28 May 2020
Accepted: 20 July 2020
First Online: 29 July 2020
Ethics approval and consent to participate
: The study protocol was reviewed by review board of Tianjin Center for TB Control. The study used retrospective and de-identified data reported to TBIMS through routine patient care-linked surveillance. The Informed consent for the patients and ethical approval was not required for the study.
: Not applicable.
: The authors declare that they have no competing interests.