Awareness, use and perception of patient versions of clinical practice guidelines – a national cross-sectional survey among patients with a cancer diagnosis and healthcare provider... oleh S. Blödt, S. Erstling, M. Becker, G. Carl, M. Follmann, S. Frenz, C. Holmberg, T. Langer, A. Pachanov, D. Pieper, M. Nothacker