To avoid waste of research, no new studies should be done without a systematic review of existing evidence. That argument has been made for 20 years, yet the lack of reference to a systematic review before designing new studies is still a problem.
Hand Lund, professor at the University of Southern Denmark joins us to explain why research before researching is still an issue.
Read the full analysis:
http://www.bmj.com/content/355/bmj.i5440
