The study was supported by Deutsche Forschungsgeminschaft, the Stiftung Rheinland-Pfalz fur Innovation, and the MAIFOR research program of the Johannes Gutenberg University of Mainz.

• 他们写道，其发现认为，腹面纹状体增加的鸦片受体，是人格特性和依赖风险之间的生物关联。