E-Mail The availability of clinical trial records has increased markedly in recent years. For instance, several documents from numerous sources are often available for a single clinical trial - sometimes with overlapping, but often incomplete information. Identifying and processing this information involves a great deal of resources and challenges. Using an example of information retrieval for a health technology assessment report, this is shown in the current issue of BMJ Evidence-Based Medicine by two researchers from the German Institute for Quality and Efficiency in Health Care (IQWiG): Beate Wieseler from the Drug Assessment Department and Natalie McGauran from the Communications Unit.