title: Crystal clear.
authors.affiliation: Department of Medicine, Johns Hopkins Hospital, Baltimore, MD 21205, USA. byehia@jhmi.edu
authors.forename: Baligh
authors.initials: B
authors.lastname: Yehia
authors.forename: John
authors.initials: J
authors.lastname: Flynn
authors.forename: Stephen
authors.initials: S
authors.lastname: Sisson
mesh_terms: D015897:Comorbidity; D005260:Female; D006073:Gout / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000453:epidemiology; D006801:Humans; D017116:Low Back Pain / Q000453:epidemiology; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology; D008875:Middle Aged; D009767:Obesity, Morbid / Q000453:epidemiology; D012598:Sclerosis; D025241:Spondylarthritis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000453:epidemiology; D014057:Tomography, X-Ray Computed