More Not Always Better: Too Many Cancer Screenings Can Yield False Positives: Doctors say screening can harm, bu.. http://bit.ly/1M8krb
11:07 AM - 1 Sep 2009
0 replies
0 retweets
2 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.