Changes

* [http://www.thebrewingnetwork.com/hop-and-brew-school-ep11-hops-and-sour-beer/ Hop and Brew School podcast interview with Vinnie Cilurzo from Russian River Brewing, Jay Goodwin from The Rare Barrel and Charlie Johnson from the Ronin Fermentation Project on using fresh and aged hops in sour beer.]

* [https://pubs.acs.org/doi/10.1021/acs.jafc.7b04055 Overview of scientific evidence of health benefits of polyphenols.]

==References==