Association between HMGB1 and COPD: A Systematic Review

Table 1

List of search terms entered into the PubMed search engines for identification the studies for this systematic review.

Number	Search term
1	COPD [all fields]
2	EMPHYSEMA [all fields]
3	BRONCHITIS [all fields]
4	SMOKE [all fields]
5	HMGB1
6	1 AND 5
7	2 AND 5
8	3 AND 5
9	4 AND 5
10	English [language]
11	2005 to present [publication date]