1. Trends in the globalization of clinical trials;Thiers;Nat Rev Drug Discov,2008
2. K A. FDA Perspective on international clinical trials
3. ClinicaTrials.gov 2017 https://clinicaltrials.gov/ct2/resources/trends
4. Bailey W CC Sharma N Make your move: Taking clinical trials to the best location https://www.atkearney.com/health/article?/a/make-your-move-taking-clinical-trials-to-the-best-location