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    Illustration of process leading to formation of amyloid protein plaques on neurons in Alzheimer disease. — Stock Photo
    Illustration of process leading to formation of amyloid protein plaques on neurons in Alzheimer disease.
    Arthritic hand anatomy — Stock Photo
    Arthritic hand anatomy
    Coloured X-ray of arthritic knees — Stock Photo
    Coloured X-ray of arthritic knees
    Normal human brain — Stock Photo
    Normal human brain
    Colored X-ray of section through thoracic spine of senior male patient with ankylosing spondylitis with severe degeneration of lower thoracic spine. — Stock Photo
    Colored X-ray of section through thoracic spine of senior male patient with ankylosing spondylitis with severe degeneration of lower thoracic spine.