Review Literature as Topic 16 Clinical Trials as Topic 6 Research 6 Statistics as Topic 5 Clinical trials 4 Evaluation Studies as Topic 4 Medicine 4 Statistics 3 Statistiek 3 Clinical Trials 2 Drug Evaluation 2 Drug Industry 2 Drugs 2 Evaluation research (Social action programs) 2 Le ́gislation 2 Me ́decine 2 Me ́dicaments 2 Patient Education as Topic 2 Pharmacy 2 Recherche 2 Research Design 2 Statistical methods 2 Testing 2 Therapies, Investigational 2 Zeitschrift 2 methods 2 therapy 2 42.00 biology: general 1 42.15 cytology, cell biology and cell physiology 1 44.00 medicine: general 1