Usability evaluation of the Computer-Based Health Evaluation System (CHES) eDiary for patients with faecal incontinence: a pilot study oleh Jens Lehmann, Isabel Schreyer, David Riedl, Michael Tschuggnall, Johannes M. Giesinger, Marjiana Ninkovic, Marcus Huth, Irmgard Kronberger, Gerhard Rumpold, Bernhard Holzner