You know, I have been wondering the same thing!!
I have taken care of so many people over the years, and I just don't remember!
In 2003 I was staff/charge in CVICU and I mostly stayed in that unit, unless I got loaned out
I do, however, have many good friends in STICU and I know they have always had good staff and CNA's.
I started off as a CNA and we do make the best nurses