SLC9A3 and adenoma: Glucose-independent salt absorption in the small intestine is mediated via the chloride/base exchangers, down-regulated in adenoma (DRA; SLC26A3) and putative anion transporter 1 (PAT1; SLC26A6), working in parallel with the Na+/H+ exchanger 3 (NHE3) [98,99,100,101,102,103,104,105,106,107,108].