ABCC8 and permanent neonatal diabetes mellitus: Heterozygous mutations in the potassium voltage‐gated channel subfamily J member 11 (KCNJ11) and ATP binding cassette subfamily C member 8 (ABCC8) impact the role of the ATP‐sensitive potassium channel (KATP) in the beta‐cell membrane, and are the most common cause of PNDM in the Western world (Flanagan, Edghill, Gloyn, Ellard, & Hattersley, 2006; Russo et al., 2011).