CLCNKB and Bartter syndrome: In recent years, Bartter syndrome has been classified into five types (types I–V) based on the different underlying disease-causing genes SLC12A1, KCNJ1, CLCNKB, BSND and MAGED2 (Seyberth, 2008; Al Shibli and Narchi, 2015; Laghmani et al., 2016).