Sánchez-Payá, J., Barrenengoa Sañudo, J., Martínez, H., Camargo Angeles, R., & Garcia Shimizu, P. (2009). Recommendations on respiratory hygiene: kit of equipment and information for patients to improve their compliance. International Journal of Infection Control, 6(1). https://doi.org/10.3396/ijic.v6i1.4857