Add Nurse hours to patient metric in SNF MARINS

"CMS may be putting into place a mandate for staffing hours per patient for SNFs: The Centers for Medicare & Medicaid Services (CMS) has in the past floated that nursing homes should deliver at least 4.1 hours of care to every resident each day, although most nursing homes function at levels well below that figure. The federal agency is expected to release its proposed rule some time this spring."