Viergever, R. F., & Li, K. Trends in global clinical trial registration: An analysis of numbers of registered clinical trials in different parts of the world from 2004 to 2013. BMJ Publishing Group.
Chicago Style (17th ed.) CitationViergever, Roderik F., and Keyang Li. Trends in Global Clinical Trial Registration: An Analysis of Numbers of Registered Clinical Trials in Different Parts of the World from 2004 to 2013. BMJ Publishing Group.
MLA (9th ed.) CitationViergever, Roderik F., and Keyang Li. Trends in Global Clinical Trial Registration: An Analysis of Numbers of Registered Clinical Trials in Different Parts of the World from 2004 to 2013. BMJ Publishing Group.
Warning: These citations may not always be 100% accurate.