full free access: Research output on primary care in Australia, Canada, Germany, the Netherlands, the United Kingdom, and the United States: bibliometric analysis - bmj.com

What is already known on this topic

• The UK Research Assessment Exercise in 2008 rated 50% of UK primary care research as world class or internationally excellent, but no direct international comparisons exist

What this study adds

• In six countries with strong primary care, the United Kingdom and the Netherlands produce the most cited primary care led primary care research
• Identifying research on primary care that is carried out by primary care researchers is difficult using routine bibliometric methods
• Only 29% of research papers on primary care had at least one primary care researcher as author