Hi Christine,
I've tried researching this myself and have found it super confusing, particularly because a lot of the research out there is in doctor-speak! I tried searching for statistics through a few university academic databases that I have access to. If you're prepared to wade through all the medical jargon, it can be informative. Some of the universities here in Qld have public access to their databases. But it can be a rather labor intensive process. I unfortunately didn't save any of the research I came across so I'm not much help there. Maybe ask your doctor to point you in the direction of some research papers?
Anyway, hope you had a lovely Christmas.
x evie