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Charlie Sheen, Dr. Oz

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Charlie Sheen has found a new ally: Dr. Mehmet Oz.

Dr. Oz appeared on Bravo's Watch What Happens Live Wednesday and revealed that he and Sheen are appearing on a special together next week in which they "chase the cure" for HIV.

"We're going to take some untraveled roads together for it," he said.

Host Andy Cohen also asked the famed cardiothoracic surgeon whether he thought Sheen should have admitted in his Today show interview that he was having unprotected sex after he knew he was HIV-positive.

"I actually, with his permission, had one of the women with whom he's having unprotected sex on my show," Dr. Oz said. "She's a nurse, and she made the point there had not been a case where a man with very low, undetectable levels of HIV had transmitted the virus."

Despite her solid argument the doctor still had his concerns. "Now, I still think it's irresponsible to have sex if you have HIV without protection. I think it's the smart thing to do no matter what," he added, "but I must say she thought about it. She certainly knew all the information. She made an informed decision, so it's hard to blame him alone for that decision."

Sheen sat down with Matt Lauer in November and revealed on-air that he was diagnosed with HIV. "I have to put a stop to this onslaught, this barrage of attacks and of sub-truths and very harmful and mercurial stories that are about me, threatening the health of so many others, which couldn't be further from the truth," he said.

He admitted that he was diagnosed "roughly four years ago" and told only a select number of people. The Anger Management star also revealed that he has had unprotected sex with two women since his diagnosis, but both of them were informed and under the care of his doctor, Robert Huizenga.

Now that his diagnosis is out in the open, Sheen told Lauer, "I have a responsibility now to better myself and to help a lot of other people, and hopefully with what we're doing today, others may come forward sand say, 'Thanks, Charlie. Thanks for kicking the door open.'"

(E!, NBC and Bravo are all part of the NBCUniversal family.)