Montserrat-Capdevila J, Godoy P, Marsal JR, Barbe F. Predictive model of hospital admission for COPD exacerbation. Resp Care. 2015 Sep;60(9):1288-94. doi: 10.4187/respcare.04005
Merrill RM, Kelley TA, Cox E, Layman AB, Layton BJ, Lindsay R. Factors and barriers influencing influenza vaccination among students at Brigham Young University. Med Sci Monit. 2010 Feb;16(2):PH29-34.