Data monitoring Research data management will involve collection, entry, processing, storage, retrieval, archival, distribution and documentation of information. Data collection will adhere to precise written forms. Data will be stored in a series of Microsoft Access data files, which will be accessible to the Investigators and their staff. Only project-related personnel will be able to access these files. Data collection forms will be kept in locked files. Quality assurance (QA) will occur as data is entered in order to check for data completeness and consistency prior to entry.