1. NICE. Tiredness/fatigue in adults. 2015 [cited 3 March 2017]. In: National Institute for Health and Care Excellence Guidelines [Internet]. Available from http://cks.nice.org.uk/tirednessfatigue-in-adults#!scenario.
2. Chronic fatigue and chronic fatigue syndrome in the general population;G. Bleijenberg;Health and Quality of Life Outcome,2003
3. Fatigue in patients with Parkinson’s disease;K Karlsen;Movement Disorder,1999
4. Fatigue in multiple sclerosis: definition, pathophysiology and treatment;LB Krupp;CNS Drugs,2003
5. NHS. Long Term Physical Health Condition. 2018. Available from https://www.datadictionary.nhs.uk/data_dictionary/nhs_business_definitions/l/long_term_physical_health_condition_de.asp?shownav=1