Here are some of the most used resources for questions related to population medicine, care delivery systems, and policy/ethics/legal topics.
A collection of six databases designed to inform healthcare decision-making: Cochrane Database of Systematic Reviews (CDSR), Cochrane Central Register of Controlled Trials (CENTRAL), Cochrane Methodology Register (CMR), Database of Abstracts of Reviews of Effects (DARE), Health Technology Assessment Database (HTA), and NHS Economic Evaluation Database (EED). It is an important resource for systematic reviews.
Resources from Healthcare Foundations
These foundations focus upon providing information and resources related to the betterment of healthcare: Commonwealth Fund, Robert Wood Johnson Foundation (RWJF), California Health Care Foundation, and Kaiser Family Foundation.