How long does Regenexx last?

I'm curious to know, regarding the treatment known as Regenexx, how long does it typically last? Is it a one-time procedure or does it require follow-up treatments to maintain its effects? Additionally, are there any factors that might influence the duration of its benefits, such as the severity of the condition being treated or the individual's overall health? It would be helpful to have a clearer understanding of what to expect in terms of longevity and potential maintenance requirements.