One of the doctors cited in the second article puts his suitcase in the bathroom..
and heat treats it when he gets home.
Ay yi yi.
Another I read, well, scanned, said something about them being found usually within eight feet of the bed. But.. people can have them on their clothes, so I wouldn't take that eight feet strictly.
Oh, second article says ddt doesn't explain all of the change. (I already forget why not).
Los Angeles is within the top ten cities with them too..