This is one POV, granted, although it's stuck in 1980.  Our page host is a notable chiropractic skeptic and physical therapist who then proceeds to give a unsourced, anecdotal account of chiropractic based on 'insider knowledge'.   Chirobase has nothing on it that isn't already published in the peer-reviewed literature, Ernst in particular.   Is there a citation to support your claim that only PTs, DOs, MDs do manipulation whereas chiropractors perform adjustments?  The intent business is antiquated; it does not reflect the contemporary sources.  Lastly, the subluxation bit is way overblown, it's used interchangeably with joint dysfunction.