@article {pmid17272248,
	title = {Sample size calculations in randomized trials: common pitfalls},
	journal = {Can J Anaesth},
	volume = {54},
	number = {2},
	year = {2007},
	month = {Feb},
	pages = {103{\textendash}106},
	author = {Brasher, P. M. and Brant, R. F.}
}
