https://www.techtimes.com/articles/10617/20140717/gene-therapy-biological-pacemaker-pigs.htm
Gene therapy used to create biological pacemaker in pigs
Jul 17, 2014 - A biological pacemaker has been developed in a pig, using gene therapy. Human trials could begin in three years.
gene therapyused tobiological pacemakercreatepigs
https://www.livescience.com/46833-biological-pacemaker-heart.html
Heart Cells Transformed Into 'Biological Pacemaker' | Live Science
Jul 16, 2014 - Putting a new gene into pig heart cells allows the cells to keep the heart's rhythm in check, a technique that might one day serve as an alternative to...
heart cellsbiological pacemakertransformedlivescience