CINCINNATI--(BUSINESS WIRE)--Chemed Corporation (Chemed) (NYSE:CHE), which operates VITAS Healthcare Corporation (VITAS), the nation’s largest provider of end-of-life care, and Roto-Rooter, the nation’s largest commercial and residential plumbing and drain cleaning services provider, reported financial results for its second quarter ended June 30, 2015, versus the comparable prior-year period, as follows: Consolidated operating results: Revenue increased 6.0% to $382 million GAAP Diluted EPS in