Another promising gene therapy, close to being submitted to the FDA for approval, has been developed by Ohio State University, Nationwide Children's hospital, and Avexis for the treatment, and possibly cure, of Spinal Muscular Atrophy.
https://avexis.com
If you have not heard of SMA, you should look it up. I had not heard of it until my 2 month old son was diagnosed. http://www.curesma.org/sma/about-sma/