In response to: Heise T, Nørskov M, Nosek L, Kaplan K, Famulla S and Haahr H. L. (2017) Insulin degludec: Lower day-to-day and within-day variability in pharmacodynamic response compared to insulin glargine U300 in type 1 diabetes. Diabetes Obes Metab. 2017;19:1032-1039