The epidemiology of fatigue: more questions than answers.
Lewis
G
G
Institute of Psychiatry, Camberwell, London, United Kingdom.
Wessely
S
S
D005221:Fatigue / Q000453:epidemiology* / Q000209:etiology; D015673:Fatigue Syndrome, Chronic / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D010342:Patient Acceptance of Health Care