Dr. Valter Longo, who was an author of this study, was on the Diane Rehm Show in January of 2014 with others discussing the benefits of fasting. All the panelists endorse fasting to some extent but it was a lively discussion that summarizes some his research as well as related research that advocates for shorter fasting periods.
http://thedianerehmshow.org/shows/2014-01-09/latest-research...