Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (SFRH/BPD/108126/2015, UMINHO/BD/47/2016, PTDC/SAU-PUB/29521/2017, UID/MAT/00144/2013)
Received: 23 February 2019
Accepted: 13 June 2019
First Online: 1 July 2019
Ethics approval and consent to participate
: This work was carried out in accordance with the recommendations by the Ethics Sub-commission of Life and Health Sciences from the University of Minho (SECVS 135/2015), by the Ethics Committee for Health of Lisbon and Tagus Valley Region Health Administration (9854/CES/2018) and the Ethics Committee for Health of the Northern Region Health Administration (ARSN 127/2018). All procedures were in accordance with the ethical standards of the responsible committees and with the Helsinki Declaration, as revised in 2008. Administrative authorization was obtained from the TB National programme to access SVIG-TB data. Informed consent was waived because only routinely collected data and anonymised at their source were used.
: Not applicable.
: The authors declare that they have no competing interests.