“…Long-term benefits in functional performance have been demonstrated previously for SET 18 -20 , as well as for ER 21,22 , in cohort studies; the only randomized clinical trial (RCT) published so far found no significant difference in walking capacity between SET and ER 23 . However, that study did not show any increase in MWD or PFWD after approximately 6 years, possibly due to the limited number of patients.…”