  ChronicFatigueSyndrome
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Sigma KEE - ChronicFatigueSyndrome
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Chronic fatigue syndrome
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Chronic fatigue syndrome (CFS), also called myalgic encephalomyelitis (ME) and ME/CFS, is a complex, fatiguing, long-term medical condition diagnosed by required primary symptoms and criteria, and often involves a broad range of symptoms. Distinguishing core symptoms are lengthy exacerbations or 'flares' of the illness after ordinary minor physical or mental activity, known as post-exertional malaise (PEM); greatly diminished capacity to accomplish tasks that were routine before the illness; and sleep disturbances. Orthostatic intolerance (difficulty sitting and standing upright) and cognitive dysfunction are also diagnostic. Other common symptoms may involve numerous body systems, and chronic pain is common. [from Wikipedia]
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| Instances | abstract | Properties or qualities as distinguished from any particular embodiment of the properties/qualities in a physical medium. Instances of Abstract can be said to exist in the same sense as mathematical objects such as sets and relations, but they cannot exist at a particular place and time without some physical encoding or embodiment. |
| | attribute | Qualities which we cannot or choose not to reify into subclasses of. |
| | biological attribute | Attributes that apply specifically to instances of OrganicObject (Organism or AnatomicalStructure). |
| | disease or syndrome | A BiologicalAttribute which qualifies something that alters or interferes with a normal process, state or activity of an Organism. It is usually characterized by the abnormal functioning of one or more of the host's systems, parts, or Organs. |
| | entity | The universal class of individuals. This is the root node of the ontology. |
| | internal attribute | Any Attribute of an Entity that is an internal property of the Entity, e.g. its shape, its color, its fragility, etc. |
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