I just registered on the site for the journal SPINE, by Lippincott Williams & Wilkins.

When presented with a list of professions, the closest I could come to Doctor of Chiropractic was Comp/Alt medicine.
In the next window, Specialty, the closest I could come was Alternative Medicine Physician or Touch Therapy.

I am curious why doctor of chiropractic or chiropractor was not listed.  I am certainly biased towards the chiropractic profession, but nonetheless would think there is far more research on and evidence based practice of chiropractic than of art therapy, aromatherapy and doula.