Table 2. Inclusion and exclusion criteria.

Inclusion Criteria	Exclusion Criteria
1. Written informed consent is not required for this retrospective epidemiological study.	1. No formal diagnosis of CF.
2. Diagnosis of CF consistent with the 2017 CFF guidelines [32].	2. A patient not followed at a U.S. CF Care Center.
3. Male or female pwCF of any age who has a history of NTM species or sub-species collected from expectorated sputum, induced sputum and/or bronchoalveolar lavage and identified by the CO-NRC as falling into a highly-related cluster within a single CF Care Center.