Fig. 4.

A Forest plot presenting the pooled analysis of the five studies on the comparison between pre- and post-treatment 6MWT change during short-term follow-up. B Forest plot presenting the pooled analysis of the four studies on the comparison between pre- and post-treatment 6MWT change at the longest follow-up. C Forest plot presenting the pooled analysis of the three studies on the comparison between pre- and post-treatment FVC% change during short-term follow-up. D Forest plot presenting the pooled analysis of the three studies on the comparison between pre- and post-treatment FVC% change at the longest follow-up