Los Angeles Business, May 23, 2008 Claiming that they are understaffed and overworked, nurses at a Tenet Healthcare Corp.'s Placentia-Linda Hospital have taken steps to form a union. Nurses at the Orange County hospital filed for a union election with the National Labor Relations Board to join the United Nurses Associations of California/Union of Health Care Professionals. Placentia-Linda nurses, which previously attempted to form a union in 2003, said hospital management won't address issues such as unsafe staffing levels and assigning patients without considering the level of care they need. ... Placentia-Linda