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4 WHAT IS HEADACHE? Headache is an almost universal experience; most of us have some kind of headache at some time in our lives. The classification system of headaches used by the medical profession is one of the longes
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Document Date: 2011-11-25 05:40:45
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4 WHAT IS HEADACHE? Headache is an almost universal experience; most of us have some kind of headache at some time in our lives. The classification system of headaches used by the medical profession is one of the longes