Article History
First Online: 14 June 2023
Competing interests
: J.H. and J.A. declare that they are named as inventors in two patent applications of the University of Duisburg-Essen on the use of leptin analogues for the treatment of anorexia nervosa and depression. J.H. received speaker’s honoraria from Amryt Pharmaceuticals and Novo Nordisk. A.H. declares no competing interests.