Research Guidelines
Guidances Generated by Regulatory Agencies
European Medicines Agency (EMA)
Access either to the draft and final or versions of the Efficacy Working Party guidelines. Among other resources you could find the guidelines (PDF format) to perform clinical trials in the following diseases: Parkinson's Disease, Schizophrenia, Alzheimer, Studies with Children, Depression, Bipolar Disorders, Multiple Sclerosis, etc.
Guide Library
United States General (FDA)