Low serum zinc levels predict presence of depression symptoms, but not overall disease outcome, regardless of ATG16L1 genotype in Crohn's disease patients. - Greuter T; Franc Y; Kaelin M; Schoepfer AM; Schreiner P; Zeitz J; Scharl M; Misselwitz B; Straumann A; Vavricka SR; Rogler G; von Känel R; et al. (Therapeutic advances in gastroenterology, 2018)