2.1 Search strategy
The International Register of Prospective Systematic Reviews (PROSPERO)
and the Cochrane Library were searched for no similar studies. The
systematic review protocol is registered on the PROSPERO website
(www.crd.york.ac.uk/Prospero), number CRD42022326995. PubMed, EMBASE,
Cochrane Library, Web of Science Core Collection and MEDLINE were
searched up until April 01, 2021, which was conducted for any relevant
randomized controlled trials (RCTs) of exercise-based PR in childhood
asthma. The language restriction is English.
Taking into account the possible differences between different
databases, the retrieval strategy was adjusted accordingly. Detailed
search strategy and steps can be found in Appendix 1 of the
Supplementary Material. Additionally, we also read citations to relevant
articles retrieved to ensure inclusion.