The term "chronic" with respect to pain should be dropped.
Adler
R H
RH
D002908:Chronic Disease; D003863:Depression / Q000150:complications* / Q000175:diagnosis; D005260:Female; D006801:Humans; D008875:Middle Aged; D010146:Pain / Q000175:diagnosis / Q000209:etiology*; D012186:Retroperitoneal Neoplasms / Q000150:complications* / Q000175:diagnosis; D009626:Terminology as Topic