@book{153,
	author = {Portney, Leslie Gross. and Watkins, Mary P.},
	title = {Foundations of clinical research :},
	publisher = {Prentice Hall Health,},
	year = {2000.},
	address = {Upper Saddle River, N.J. :},
	edition = {Second edition.},
	note = {Includes index.}
}