[Center monitoring and management of data bases].

In this article the authors show the correct method to gather together clinical data. First they explain how to compile clinical files (five cards) and how to maintain the centres and monitor them. The initial quality of the data is increased by the creating of a structure with "regional" and "central" monitors. Thirdly the authors explain data management: how to code and enter data, how to check its correctness and lastly data base authorization.