Amsterdam Efficient Deduplication (AED) method

In extensive searching of biomedical literature, especially for systematic reviews, it is common practice and usually required to search multiple databases. Depending on the specific subject it can range from 2 to more than 10 databases. The results will therefore contain many duplicates. But deduplication can be a time-consuming process and is sensitive to faults.We describe a method (the Amsterdam Efficient Deduplication (AED)  method) which is efficient, highly reliable and time saving.