I wouldn't want to speculate, but from what I've heard, and judging by the way I grew up and tried to basically hide this, I believe that there are a lot more than 400 of us out there. As to whether they're still living or not, that's the other issue.
For this Wolff-Parkinson-White syndrome that I mentioned earlier, there was a 40% mortality rate at birth for thalidomide babies. They now believe that what was causing it was this Wolff-Parkinson-White syndrome. Like I said, it only occurs in 2% of the population. It states right on the TVAC site and in other medical journals I've read that it's more so in people exposed to thalidomide.