
Keywords: CKD; chronic kidney disease; CKD-MBD; CKD-related Mineral and Bone Disorder; 5-HT; serotonin; 5-HIAA; 5-hydroxyindoleacetic acid; TRP; tryptopha; BDS; brain-derived serotonin; Tph2; tryptophan hydroxylase-2; SNS; sympathetic nervous system; β2-adr-R; β2