- Staff at Institute of Biomedical Informatics at Faculty of Medicine at University of Ljubljana (Inštitut za biomedicinsko informatiko MF, IBMI) with a wide variety of investigators both within the Ljubljana University Medical Center and outside Ljubljana University research community. This group has been a data processing resource center for multi-center studies since 1973. The IBMI has a staff of 16 with expertise in computerized data collection and tracking systems, quality control procedures, sleep and statistical analyses.