Today, Haley seems like a different girl. The 15-year-old is now able to complete whole sentences and have conversations with her family. It's a skill she didn't develop until now. "I say prior to this, she was just merely existing. She's now really living," says Lisa Smith, Haley's mother. "Her seizures have been down by 45 percent, and we've been able to lower her pharmaceuticals by a third."