Evaluation of minimum volume standards for surgery in the Netherlands (2003-2017): A successful policy?

Based on the Dutch experience, the following lessons can be useful for other health care systems: 1. professionals should be in the lead in the development of national quality standards, 2. external pressure can be helpful for professionals to take the initiative and 3. volume remains a controversial quality measure. Future research and policies should focus on the underlying mechanism of volume-outcome relationships and overall effects of volume-based policies.