Google, First Round back Invite founders' Flatiron Health

Nat Turner and Zach Weinberg were still Penn students when they and two classmates cofounded Invite Media, an online ad-buying service that drew funding from Comcast's Genacast and Josh Kopelman's Philadelphia-based First Round Capital before it was sold to Google for a reported $70 milllion+ in 2010.

Relocated to New York, the pair are back with Flatiron Health, which Kopelman says is "focused on bringing the power of Big Data to the healthcare space" with an "oncology data platform" designed to "mine" cancer therapy trial information against medical and regulatory standards. Flatiron counts First Round, Google Ventures, Lab Corp. and others as early investors. More from Kopelman at his blog here.