http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12460689&dopt=Abstract
Biol Psychiatry 2002 Dec 1;52(11):1057-65
Czeh B, Welt T, Fischer AK, Erhardt A, Schmitt W, Muller MB, Toschi N, Fuchs E, Keck ME.
The German Primate Center, Division of Neurobiology, (BC, AKF, EF), Gottingen, Germany