@article {9692,
	title = {Abnormal pain response in pain-sensitive opiate addicts after prolonged abstinence predicts increased drug craving},
	journal = {Psychopharmacology},
	year = {2009},
	pages = {423-429},
	doi = {10.1007/s00213-009-1472-0},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/19172249},
	author = {Zhen-Yu Ren and Jie Shi and David H. Epstein and Jun Wang and Lin Lu}
}
