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support him. he's followed by ron paul at 22%. rick santorum is now third with 16%. newt gingrich is at 14%. michele bachmann is on the campaign trail in des moines right now, a day after one of her high profile advisers defected. bachmann is likely to face questions about the decision by state senator ken sorenson to jump ship and throw his support behind ron paul. we're keying an eye on bachmann's media event and we'll take you there live for some of the q and a session. he may be the front-runner but mitt romney isn't predicting how he will do in the iowa caucuses. he started ...

shot rick santorum leap frogs into fourth. his support has tripled since the beginning of the month and closing in on mitt romney and ron paul who are locked in the statistical ties within the margin of error. joe johns is in des moines to break it down. of course, the question is, did the gingrich camp see this coming? >> yeah, i think to some degree they saw this coming. hammering ron paul, for example. also, mitt romney. it's pretty clear that gingrich saw he had some problems because he was just getting hammered on tv ads day after day from these guys. a lot of people attacking h...

What i would say is we need to concentrate on improving our outcome and, better trained surgeons, maybe the technology, experience of oncology and help or patients not to put our head in the sand and say, no psa. >> jamie: quickly on the test and the next topic is dr. siegel. what about physical examination for healthy men instead of the psa test? is that enough? >> it is not enough. and you need to have the exam and the psa. i'm glad you brought it up, and we are seeing prostate cancer with younger men in their 40s and 50s. >> it is part of the art of medicine and there are 30% less deaths fr...

this month, these flyers like this will need to be handed out and on display in stores. take a look. cell phones emit radio-frequency energy. you'll start seeing those here in san francisco along with specific tips on what to do including limiting cell phone use by children, using a headset, using belt clips, avoiding cell phones in weak signal areas. this is something, again, we've been reporting on for some time. concern that using a cell phone for too long, too many years could potentially be problematic to your health. the world health organization even weighing in on this earlie...

specific tips on what to do including limiting cell phone use by children, using a headset, using belt clips, avoiding cell phones in weak signal areas. this is something, again, we've been reporting on for some time. concern that using a cell phone for too long, too many years could potentially problematic to your health. the world health organization even weighing in on this earlier this year saying they now consider cell phone radiation the nonionizing radiation a plausible carcinogen, something that could cause cancer. at least here in san francisco, you'll see flyers like this f...