I haven't heard of that connection either. I don't think that Canada has a national registry, if we do then nobody has told me about it. I have wondered a lot in the last while that the doctors don't ask enough questions about a person's past. I've answered the same basic questions to a whole bunch of different health care types but I don't know if anyone is really doing in-depth large scale studies about people's life styles and medical histories and putting all of them together to try to find patterns or connections.