Table 1. Literature search strategy of the PubMed database.
| #1 | “Pulmonary Disease, Chronic Obstructive” [Mesh] |
| #2 | COPD |
| #3 | Chronic Obstructive Pulmonary Disease |
| #4 | COAD |
| #5 | Chronic Obstructive Airway Disease |
| #6 | Chronic Obstructive Lung Disease |
| #7 | Airflow Obstruction, Chronic |
| #8 | Airflow Obstructions, Chronic |
| #9 | Chronic Airflow Obstructions |
| #10 | Chronic Airflow Obstruction |
| #11 | #1 OR #2 OR #3 OR #4 OR #5 OR #6 OR #7 OR #8 OR #9 OR #10 |
| #12 | “Bronchiectasis” [Mesh] |
| #13 | Bronchiectases |
| #14 | #12 OR #13 |
| #15 | “Risk Factors” [Mesh] |
| #16 | Factor, Risk |
| #17 | Factors, Risk |
| #18 | Risk Factor |
| #19 | Population at Risk |
| #20 | Risk, Population at |
| #21 | Populations at Risk |
| #22 | Risk, Populations at |
| #23 | #15 OR #16 OR #17 OR #18 OR #19 OR #20 OR #21 OR #22 |
| #24 | #11 AND #14 AND #23 |
COAD, Chronic Obstructive Airways Disease; COPD, Chronic obstructive pulmonary disease.