Hundreds of nurses, joined by other health care advocates and policy makers, will hold a rally outside the State House on two critically important issues affecting the health care of every resident in Massachusetts, as the deadline for legislative action draws near for two ballot initiatives that garnered more than 200,000 signatures from Massachusetts voters last fall. In addition to calling for legislative action, the nurses are using the event to launch the final round of signature gathering needed to place the issues on the ballot in November.