Retraction for Xiaosong Ma et al., “Glucagon-Like Peptide 1 Stimulates Hypothalamic Proopiomelanocortin Neurons”

At the request of the authors, the following manuscript has been retracted: “Glucagon-Like Peptide 1 Stimulates Hypothalamic Proopiomelanocortin Neurons” by Xiaosong Ma, Jens Bruning, and Frances M. Ashcroft, which appeared on pages 7125–7129 of the July 4, 2007 issue.