Cancer and HV, not proven and coincidental.
Magnetic fields of high voltage power lines and risk of cancer in Finnish adults: nationwide cohort study -- Verkasalo et al. 313 (7064): 1047 -- BMJ
But this UK study shows some statistical difference.
HPA Press Statement | Childhood Cancer and Distance from High-Voltage Power Lines
However over here many people in a building got cancer and they haven't really nailed the problem.
Hope new study will unlock ABC cancer cluster mystery - ABC News (Australian Broadcasting Corporation) ABC Message Board - Australian Story Guestbook - Messages
Could be the dish outside, the lighting inside etc ...
In either case, there would have to be some reason. Remember the movie Erin Brockovich, the defendants were also trying to claim statistical coincidence.
I personally believe that there would have to be some cellular impact, cells themselves have energy and electromagnetic fields most likely do something to them over the long term.