Sustained effects of a mindfulness-based stress-reduction intervention in type 2 diabetic patients: design and first results of a randomized controlled trial (the Heidelberger Diabetes and Stress-study) - Hartmann, Mechthild; Humpert, Per Magnus; Herzog, Wolfgang; Nawroth, Peter Paul; Kopf, Stefan; Kircher, Claudia; Faude-Lang, Verena; Djuric, Zdenka; Augstein, Florian; Friederich, Hans-Christoph; Kieser, Meinhard; Bierhaus, Angelika (Diabetes care, 2012)