@book{3837,
	author = {Ruiz Morales, Alvaro and Gómez Restrepo, Carlos},
	title = {Epidemiología clínica : investigación clínica aplicada},
	publisher = {Médica Panamericana ,},
	year = {2015.},
	address = {Bogotá :},
	edition = {2a ed.}
}