A research article, more recent than the 90s, about DID, if you are genuinely interested: www.ncbi.nlm.nih.gov/pmc/articles/PMC4959824/
Thanks for that link
it leads to a 2016 article
Separating Fact from Fiction: An Empirical Examination of Six Myths About Dissociative Identity Disorder
The authors are listed as follows:
Bethany L. Brand, PhD, Vedat Sar, MD, Pam Stavropoulos, PhD, Christa Krüger, MB BCh, MMed (Psych), MD, Marilyn Korzekwa, MD, Alfonso MartÃnez-Taboas, PhD, and Warwick Middleton, MB BS, FRANZCP, MD
I just wondered whether you were aware that all of the authors in the paper you recommend are deeply involved in a widely derided centre for quackery and psychiatric malpractice called the International Society for the Study and Treatment of Trauma and Dissociation (ISSTD)?
This highly abusive organisation has been hurting and exploiting vulnerable people for decades.
Amazingly, even though they have been exposed multiple times over the years and their various members have been disgraced and subjected to disciplinary actions, they are still at it and are still recommended as authorities on MPD/DID/complex trauma by naive people, as your post clearly demonstrates.
If you are really interested in the subject you may wish to check out this excellent albeit now rather old documentary all about the work of the ISSTD