Veen, Anna van der Urinary Excretion of 6-Sulfatoxymelatonin, the Main Metabolite of Melatonin, and Mortality in Stable Outpatient Renal Transplant Recipients. [electronic resource] - Journal of clinical medicine Feb 2020 Publication Type: Journal Article ISSN: 2077-0383 Standard No.: 10.3390/jcm9020525 doi