First you have to step back and see that the entire mental health industry has been part of a gigantic lie. They have allowed this tragedy to happen to many thousands while they profited from the fiasco or simply stood by and watched it happen. Truth is absolute and therapists have been absolutely wrong about many things about which they claimed expertise. The mental health industry has refused to deal with truth for a long time. This is not only unprofessional but extremely dangerous.
Therapists refuse to admit the truth about their errors.
MPD patients should not wait for that unlikely event to occur. They should leave therapy and come out of the deception now. Allow the truth to set you free to lead a normal and healthy life. By doing a bit of critical thinking on one's own, the truth can be learned about who is deceiving whom. No one is actually regressing to past lives.