Received: 14 October 2019
Accepted: 23 January 2020
First Online: 3 February 2020
Ethics approval and consent to participate
: In accordance with Danish law, observational studies performed in Denmark do not need approval from the Medical Ethics Committee or written consent from participants (Danish Scientific Ethical Committees Act §14)Access to medical records was approved by the Danish Health Authority (Jnr 3–3013-1213/1). Permission to access the database from the Danish national TB surveillance unit was obtained from the Danish Data Protection Agency (Jnr. 15/34961)Data was de-identified and all analyses are presented anonymously
: Not applicable
: The authors declare that they have no competing interests.