Dissociative Identity Disorder(Multiple Personality)

Is Dissociative Identity Disorder(Multiple Personality) a true disorder, or is it caused by other factors like iatrogenesis?

Needs to support a position on the topic. Defend a logical argument with support from reliable sources. Four references at least two of the sources need to be reputable academic journals. The other two sources needs to be reputable and researched based data. 12 point Times New Roman font.
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