Osterman has also collaborated closely with Emmy Award winner and Guinness World Record Holder, Dan Buettner, helping him found the Quest Network and establish the Blue Zones.
In early 2006, a group of researchers led by adventure writer Dan Buettner and supported by National Geographic Magazine, the National Institute on Aging, and Allianz Healthcare, designated Nicoya as a Blue Zone.
Dan Aykroyd | Steely Dan | Dan Quayle | Dan Rather | Dan Cruickshank | Dan Brown | Dan Simmons | Dan Fogelberg | Dan Abnett | England Dan & John Ford Coley | Dan Ryan Expressway | Dan Deacon | Dan Reeves | Dan Graham | Dan Burton | Dan Wheldon | Dan | Dan Savage | Dan in Real Life | Dan Hill | Dan Flavin | Dan Vapid | Dan Sperber | Dan Penn | Dan Bricklin | Dan Tyminski | Dan Slott | Dan Lipinski | Dan Fante | Dan Dare |