Additional file 1: of Assessment of fatigability in patients with spinal muscular atrophy: development and content validity of a set of endurance tests BartelsBart HabetsLaura StamMarloes WadmanRenske WijngaardeCamiel SchoenmakersMarja TakkenTim HulzebosErik PolW. GrootJanke 2019 Description of outcome measures considered for selection. Description of data: Description of studies about outcome measures considered for selection. (DOCX 17 kb)