"Currently, there are no approved therapies in regenerative medicine for heart failure, " said Karen Christman, assistant professor of bioengineering at the University of California, San Diego, who wasn't involved in the latest experiments.
It was caused by a private landowner clearing vegetation with a weed trimmer, which may have hit a rock and produced a spark that ignited the dry brush, U.S. Forest Service spokeswoman Linda Christman said.