Help with collaborative record with the annotated PDF file

Is there a way I can have a group of people annotate the same pdf file, but the file indicate that added marks annotated on the PDF document in the result?

I have 5 users who will use box.net and dropbox shares the same file in a folder PDF collaborated and I would like to know if it is possible to manage an annotated pdf document version control.

Anyone have any idea of which app or if it is still possible?

Example would open the PDF file and I highlighted the first paragraph and then someone else opens it and entering a note, and the next person highlighted the last paragraph. To see who did what on the recorded final copy?

Thanks to those who meet.