Mr Giacomoni. As you're still lurking, one piece of advice.
Your posts make it abundantly clear that (consciously or not) you have a pretty patronising attitude to this community. The self-justification and attempts at reassurance do not sit easily with people who are vastly more perceptive, experienced, and empathetic than you.
This does not bode well for an attempt at Masters-level investigation into PTSD, of any form. I'm afraid that, short of pathologically re-wiring yourself, you simply do not have the empathy, experience, communicative skills or sensitivity to obtain the information and insights that you would need in order to present a well-researched work.
Might I suggest you look to some other area for an investigative exercise, one that would not be, as you might see it, so counter-productive for you.
I do hope this well-meant advice helps.