HNF1B and diabetes mellitus: Genetic testing with next-generation sequencing (NGS) of the 27 genes most commonly associated with monogenic diabetes genes (GCG, GLUD1, WFS1, HNF1A, GCK, INS, HNF1B, ABCC8, HNF4A, RFX6, PTF1A, AKT2, ZFP57, INSR, EIF2AK3, PPARG, PAX4, PDX1, GLIS3, KCNJ11, SLC16A1, FOXP3, BLK, CEL, KLF11, SCHAD, and GCGR) was performed but without significant results.