Ethical approval

Not applicable for this article.

Informed consent

Not applicable for this article.

Conflict of interest in respect to the article

ADA reports fees for lectures/advisory boards from Amgen, Bianex, Eli-Lilly, Er-Kim, Galenica, ITF, Uni-pharma, and UCB; MPY reports fees for lectures/advisory boards from Amgen, Er-Kim, Galenica, Genesis, and UCB; EK reports fees for lectures/advisory boards from Amgen, AstraZeneca, Er-Kim, and UCB; FA reports fees for lectures/advisory boards from Amgen, Er-Kim, and Kyowa Kirin; AV has nothing to declare; ST reports fees for lectures/advisory boards from Amgen, AstraZeneca, Elpen, Er-Kim, Genesis and UCB; PM reports research grants from Amgen and Galenica and fees for lectures/advisory boards from UCB, Elpen, Bianex, Eli-Lilly.