Pennsylvania Attorney General Josh Shapiro accused a major nonprofit hospital system and health insurer of failing to fulfill its charitable mission Thursday, taking a step into a bruising, years-long regional health-care battle that has become emblematic of how broader changes rippling through the health-care system can leave sick people caught in the crossfire of competition between multibillion-dollar nonprofits. NOTE: This story also ran in The San Francisco Chronicle (SF Gate). Faculty Associate Gerard Anderson is quoted.