Since September 27, 2007, George Halvorson has personally written a weekly letter -- delivered each Friday to all employees -- celebrating achievements, successes, awards, and milestones of Kaiser Permanente. He has not missed a week. Topics have included Kaiser Permanente's leadership role in slashing HIV-AIDS mortality rates in half, reducing pressure ulcers by 60 percent, preventing the number of broken bones in senior citizens by more than 30...