@article {Stubhaug:July 1995:0304-3959:111,
	author = "Stubhaug A.",
	author = "Grimstad J.",
	author = "Breivik H.",
	title = "Lack of analgesic effect of 50 and 100 mg oral tramadol after orthopaedic surgery: a randomized, double-blind, placebo and standard active drug comparison",
	journal = "Pain",
	volume = "62",
	year = "July 1995",
	abstract = "",
	pages = "111-118(8)",
	url = "http://www.ingentaconnect.com/content/els/03043959/1995/00000062/00000001/art00056"
	doi = "doi:10.1016/0304-3959(95)00056-X"
}