After four marathon days of negotiating, Philadelphia-based Temple University Hospital and its 1,500 nurses and allied health professionals reached an agreement to end a 28-day strike that began March 31. The employees plan to return to work at 7 p.m. April 30, assuming the proposed contract is approved during three ratification votes. After the members of the Pennsylvania Association of Staff Nurses and Allied Professionals vote, the proposal will be presented to the management of the Temple University Health System.