@article {Senay:1 April 2003:0376-8716:233, author = "Senay E.C.", author = "Adams E.H.", author = "Geller A.", author = "Inciardi J.A.", author = "Munoz A.", author = "Schnoll S.H.", author = "Woody G.E.", author = "Cicero T.J.", title = "Physical dependence on Ultram(R) (tramadol hydrochloride): both opioid-like and atypical withdrawal symptoms occur", journal = "Drug and Alcohol Dependence", volume = "69", year = "1 April 2003", abstract = "", pages = "233-241(9)", url = "http://www.ingentaconnect.com/content/els/03768716/2003/00000069/00000003/art00321" doi = "doi:10.1016/S0376-8716(02)00321-6 " }