authors Ebrahim, S Akl, Elie Mustafa, R Sun, X Walter, Stephen Heels-Ansdell, D Alonso-Coello, P Johnston, B Guyatt, Gordon
keywords 42 Health Sciences 4202 Epidemiology 8 Health and social care services research 8.4 Research design and methodologies (health services) Clinical Research Clinical Trials and Supportive Activities Generic health relevance Prevention