The best way for you to satisfy your confusion would be to settle the equation with someone from management. An e-mail or two would probably do the trick and then you can report back on here.
If you were wondering why we don't know how PP was selected, then welcome to club. Pharma typically does not release trial protocol before applying for NDA or publishing (some periodicals do required it as a part of publication).
Otherwise, I don't have a clue what you might be after. Sorry.