Long-term efficacy and safety of insulin detemir compared to neutral protamine Hagedorn insulin in patients with type 1 diabetes using a treat-to-target basal-bolus regimen with insulin aspart at meals: a 2-year, randomized, controlled trial - Bartley, P C; Bogoev, M; Larsen, J; Philotheou, A (Diabet Med, 2008)