INS and liver dysplastic nodule: Serum glucose levels in insulin-treated, vitamin D-treated, and combined insulin and vitamin D-treated groups were significantly lower than that in DN group (182.33 ± 8.55, 288.33 ± 24.0, 138 ± 6.72 mg/dL, respectively; P < 0.05) but still significantly higher than that in control group (P < 0.05).