Secreted frizzled-related protein 4 reduces insulin secretion and is overexpressed in type 2 diabetesCell Metab - Mahdi, T; Hänzelmann, S; Salehi, A; Muhammed, S J; Reinbothe, T M; Tang, Y; Axelsson, A S; Zhou, Y; Jing, X; Almgren, P; Krus, U; Taneera, J; Blom, A M; Lyssenko, V; Esguerra, J L; Hansson, O; Eliasson, L; Derry, J; Zhang, E; Wollheim, C B; Groop, L; Renström, E; Rosengren, A H (2012)