http://www.gbss.org.uk/
I've never heard of it either, we were just talking about it over in the thrid tri forum.. Sounds like something we should get done, but don't here in the UK..
I can't seem to find out exactly why not though..
I didnt like the thought of an anal swab, but then read up on it and it does sound like something I wouldn't mind paying and doing it myself and sending it off..
That website ^^^ makes it sound very serious.... Or is that just hype???
