Temple University Hospital and 1,500 of its employees are preparing for a strike that could start March 31. Both sides are running radio ads touting their positions, and the hospital has hired 850 temporary workers from around the country. The Pennsylvania Association of Staff Nurses and Allied Professionals, which represents 1,000 registered nurses and 500 staffers such as respiratory therapists and social workers, has set 7 a.m. March 31 as its strike deadline. The last bargaining session was held March 15, and the talks are in mediation, the Philadelphia Inquirer reports.