Chicago Sun-Times, July 17, 2011 Joliet - Nurses working in the Ambulatory Surgery Center at Provena Saint Joseph’s Medical Center voted earlier this month to organize as a union under the direction of the Illinois Nurses Association. INA has been representing nurses at Provena since 1993. The 11-to-7 vote means that INA will soon begin negotiations on a contract with the nurses and management of the Surgery Center. The Surgery Center has three operating rooms and two procedure rooms.