Nearly one-third of the population has persistent or recurrent chronic pain-and of those, one-half to two-thirds are either partially or totally disabled for periods of days, weeks, or months, and sometimes permanently. (John Bonica)

Nearly one-third of the population has persistent or recurrent chronic pain-and of those, one-half to two-thirds are either partially or totally disabled for periods of days, weeks, or months, and sometimes permanently.

John Bonica

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chronic days one-half months one-third

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