Vikings wide receiver Percy Harvin is hoping to avoid the migraine headaches that have bothered him for a majority of his life. Harvin dealt with quite a few during his rookie season. He missed a game against Cincinnati in December and did not practice for most of the week leading up to the NFC championship. He has visited the Mayo Clinic in a search for a cure, but so far has been unable to find a fail-proof answer. "It was still meeting with a couple of doctors, and having a plan," said Harvin. "It's something you have to go through, outgrow. My mom had them when she was younger, and she's dealt with them."