@book{31604,
	author = {Portney, Leslie Gross. and Watkins, Mary P.},
	title = {Foundations of clinical research :},
	publisher = {Pearson/Prentice Hall,},
	year = {c2009.},
	address = {Upper Saddle River, N.J. :},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0725/2007035116.html}
}