Protein intake and cancer: an umbrella review of systematic reviews for the evidence-based guideline of the German Nutrition Society - Kühn, Tilman; Kalotai, Nicole; Amini, Anna M.; Haardt, Julia; Lehmann, Andreas; Schmidt, Annemarie; Buyken, Anette E.; Egert, Sarah; Ellinger, Sabine; Kroke, Anja; Stangl, Gabriele I. (European journal of nutrition, 2024)