I read an article the other day around the new definitions of mental illnesses the committee on DSM-5 (one of my fav. subjects) destined from its inception to dictate treatment and understanding of the illnesses of the mind.

They are removing "complex" as a reference to trauma, inferring there is no difference in sypmtomes between an individual witnessing one trauma only (say, a car crash) and an ind. witnesses their sister being killed and then is raped six months later and next abused for five years by a husband whom her parents love. Her parents are killed in a car accident the following year. "She" breaks down. That would be the "sequela" of trauma which carries with it different symptoms (and therefore infers different treatment) than non-complex PTSD.