One practitioner, from the first visit to the last.
Thornbury Chiropractic has never grown past one treatment room. That was a decision, not a stage the practice has yet to reach. When a clinic takes on associates, patients start seeing whoever is free rather than the person who actually knows their case.
The same rule applies to treatment itself. Every course ends with a discharge date, agreed at the start, because a clinic that only earns money while you keep coming back has the wrong incentive built into it.