Proposals to enhance the quality of observational cohort studies.
Wegener T, Schneider B, Working Party of the German Society of Phytotherapy·Phytomedicine : international journal of phytotherapy and phytopharmacology
For herbal medicinal products the methodology of observational cohort studies (observational studies, drug monitoring studies, Anwendungsbeobachtung) represents a useful addition to clinical trials. The key objectives are the documentation of efficacy in particular under conditions of everyday medical practice in authe…