[Unexplained non-cardiac chest pain: prevalence and natural course].
D000368:Aged; D000777:Anesthetics / Q000627:therapeutic use; D002637:Chest Pain / Q000209:etiology*; D002908:Chronic Disease; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009209:Myofascial Pain Syndromes / Q000150:complications* / Q000628:therapy*