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Pharma's windfall: The mining of rare diseases

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SEATTLE — Her vision failed first. Then she fell asleep at school from inexplicable fatigue. Even walking proved difficult, often impossible, as she knocked into furniture and walls. It was like an electrical switch in her body toggled without warning. Some days she was in control, most she was not. Specialists were stumped. Some wondered if 10-year-old Violet O'Dell exaggerated her symptoms...

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