BRIEF-Moody's asgns B2 rtg to DaVita's sr. note offering; Ba3 CFR affirmed By: Reuters: Company News August 14, 2012 at 09:05 AM EDT * Moody's assigns B2 rating to DaVita's sr. note offering; Ba3 CFR affirmed Read More >> Related Stocks: DaVita HealthCare Partner