As another year comes to an end, we take you through the year in health. Among the biggest health news of the year, October 1st marked the nationwide launch of the Affordable Care Act, an effort to transform the insurance market for people who don't get benefits at work. Locally, 2013 confirmed the culmination of 20 years of work led by University of Pennsylvania gene-therapy pioneer Carl June to eradicate blood cancers. Plus, electronic cigarettes emerged as a safe alternative to smoking but are they really any healthier? Take a look back at all of that and more in the 2013 year in review.