@article {9687,
	title = {Circadian Alteration in Neurobiology During 30 Days of Abstinence in Heroin Users},
	journal = {Biological Psychiatry},
	year = {2009},
	pages = {905-912},
	doi = {10.1016/j.biopsych.2008.11.025},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/19135652},
	author = {Su-Xia Li and Jie Shi and David H. Epstein and Xi Wang and Xiao-Li Zhang and Yan-Ping Bao and Dai Zhang and Xiang-yang Zhang and Thomas R. Kosten and Lin Lu}
}
