Dr. Allen R. Nissenson became our chief medical officer, DaVita Kidney Care, in March 2014. From August 2008 to March 2014, he served as our chief medical officer. He is an emeritus professor of medicine at the David Geffen School of Medicine at UCLA, where he served as director of the dialysis program from 1977 to 2008 and associate dean from 2005 to 2008. Dr. Nissenson was the president of the Southern California End-Stage Renal Disease Network from 2005 to 2007. Dr. Nissenson was the president of the National Anemia Action Council from 2001 to 2007. Dr. Nissenson was the president of the Renal Physicians Association from 1999 to 2001.