You have your work cut out for you. LilAngel needs your help badly. 8D
That thought did cross my mind while writing my reply, but we are only human, after all. ;-)
Seriously, See post #122 here by UCANSEE2 . Some doctors have referred to PVS as permanent. Some doctors have referred to it as persistent. So we were both right-- or wrong-- depending on viewpoint.
Apparently, there is nothing straightforward about this... Sigh.