Many states within the US are taking Maternal Mortality Review Committees a step further and are collaborating with various professional organizations to improve quality of perinatal care. These teams of organizations form a "perinatal quality collaborative," or PQC, and include state health departments, the state hospital association and clinical professionals such as doctors and nurses. These PQCs can also involve community health organizations, Medicaid representatives, Maternal Mortality Review Committees and patient advocacy groups. By involving all of these major players within maternal health, the goal is to collaborate and determine opportunities to improve quality of care. Through this collaborative effort, PQCs can aim to make impacts on quality both at the direct patient care level and through larger system devices like policy. It is thought that the institution of PQCs in California was the main contributor to the maternal mortality rate decreasing by 50% in the years following. The PQC developed review guides and quality improvement initiatives aimed at the most preventable and prevalent maternal deaths: those due to bleeding and high blood pressure. Success has also been observed with PQCs in Illinois and Florida.