Chalder Fatigue Questionnaire mentioned here:
Pust, G., Pöttgen, J., Randerath, J., Lau, S., Heesen, C., Gold, S. M., & Penner, I. K. (2019). In search of distinct MS-related fatigue subtypes: results from a multi-cohort analysis in 1.403 MS patients. Journal of neurology, 266(7), 1663–1673...