Arnold, D. H., Gebretsadik, T., Minton, P. A., Higgins, S., & Hartert, T. V. (2008). Assessment of severity measures for acute asthma outcomes: A first step in developing an asthma clinical prediction rule().

Arnold, Donald H., Tebeb Gebretsadik, Patricia A. Minton, Stanley Higgins, och Tina V. Hartert. Assessment of Severity Measures for Acute Asthma Outcomes: A First Step in Developing an Asthma Clinical Prediction Rule(). 2008.

Arnold, Donald H., et al. Assessment of Severity Measures for Acute Asthma Outcomes: A First Step in Developing an Asthma Clinical Prediction Rule(). 2008.