2a.the pain is disproportionate to the nature or extent of injury/pathology AND/OR 2b.the pain is disproportionate, non-mechanical, and unpredictable in response to aggravating/easing factors AND/OR 2c.the pain has a strong association with maladaptive psychological factors AND/OR 2d. the pain is diffuse/non-anatomic areas of pain/tenderness to palpation.