Boston Globe, December 29, 2011 A hospital workers union has criticized Rhode Island regulators for raising the possibility that state officials could pull the plug on a proposed merger between a Boston-based hospital chain and a financially troubled medical center in Woonsocket. A state judge in June approved plans for Steward Health Care Systems to acquire Landmark Medical Center and the two filed their application to the state in October. State health officials say the application is incomplete and gave Landmark and Steward until January 11 to file a complete application.