Essential Concepts in Clinical Research: Randomised Controlled Trials and Observational Epidemiology CLICK THE DOWNLOAD BUTTON BELOW.. Essential Concepts in Clinical Research: Randomised Controlled Trials and Observational Epidemiology READ MORE DETAIL..GET STARTED Essential Concepts in Clinical Research: Randomised Controlled Trials and Observational Epidemiology CLICK THE DOWNLOAD BUTTON BELOW.. Essential Concepts in Clinical Research: Randomised Controlled Trials and Observational Epidemiology READ MORE DETAIL..GET STARTED