Hanefeld, M., Pfützner, A., Forst, T., Kleine, I., & Fuchs, W. (2011). Double-blind, randomized, multicentre, and active comparator controlled investigation of the effect of Pioglitazone, Metformin, and the combination of both on cardiovascular risk in patients with type 2 diabetes receiving stable basal insulin therapy: The PIOCOMB study. BioMed Central.

Hanefeld, Markolf, Andreas Pfützner, Thomas Forst, Iris Kleine, und Winfried Fuchs. Double-blind, Randomized, Multicentre, and Active Comparator Controlled Investigation of the Effect of Pioglitazone, Metformin, and the Combination of Both On Cardiovascular Risk in Patients With Type 2 Diabetes Receiving Stable Basal Insulin Therapy: The PIOCOMB Study. BioMed Central, 2011.

Hanefeld, Markolf, et al. Double-blind, Randomized, Multicentre, and Active Comparator Controlled Investigation of the Effect of Pioglitazone, Metformin, and the Combination of Both On Cardiovascular Risk in Patients With Type 2 Diabetes Receiving Stable Basal Insulin Therapy: The PIOCOMB Study. BioMed Central, 2011.