Fig. 1From: Light therapy for better mood and insulin sensitivity in patients with major depression and type 2 diabetes: a randomised, double-blind, parallel-arm trialResearch hypothesis. Schematic overview of the research hypothesis. a Schematic overview of the relationship between the biological clock, depressive symptoms and insulin sensitivity in patients with major depression and type 2 diabetes. b Schematic overview of the hypothesised effect of light therapy on the biological clock, depressive symptoms and insulin sensitivity in patients with major depression and type 2 diabetesBack to article page