How long have PBRNs been around?
For the past 30 years, primary care PBRNs have engaged in the scientific research within the patient care or practice setting. There are more than 200 PBRNs in the United States, and the numbers are growing. A list of the registry for primary care PBRNs can be found at http://pbrn.ahrq.gov/portal/server.pt.