Instruction This sample includes a simple structure for a follow-up clinical study with: main file: "clinical study" person information: basicdata.rec status at clinical controls: controlvisit.rec pre-study level: prestudy.rec side effect registration: sideeffect.rec All of the files MUST be extended for a real study. Open the system with the data file "clinical study.rec" in EpiData Entry. To do so: 1. Get EpiData Entry from: www.epidata.dk 2. Install EpiData Entry 3. Use EpiData Entry - tools menu to unzip whole package 4. Notice - for backup to work there must be a subfolder with the name "BACKUP" 5. extend the system for a "real study", by extending the qes files. Discuss problems on the EpiData-list, see front page of www.epidata.dk Further introduction to EpiData, see www.epidata.org/wiki - find the fieldguide Jens Lauritsen EpiData Association Odense, Denmark November 2007 Notice, that all EpiData Materials are supplied at no cost. See license and copyright statements on website.