Why do some people develop chronic pain?

THAT?S THE WHY:WHY DO some people, but not others, go on to develop chronic, persistent pain after an episode of back pain? (Source: The Irish Times - Health)

Source: http://www.medworm.com/index.php?rid=6198736&cid=u_0_26_f&fid=39048&url=http%3A%2F%2Frss.feedsportal.com%2Fc%2F851%2Ff%2F10852%2Fs%2F212d4f77%2Fl%2F0L0Sirishtimes0N0Cnewspaper0Chealth0C20A120C0A710A0C122431970A91860Bhtml%2Fstory01.htm

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