Age and African-American race impact the validity and reliability of the asthma control test in persistent asthmatics oleh Allison J. Burbank, Krista Todoric, Pamela Steele, Jonathan Rosen, Haibo Zhou, Marcia Frye, Ceila E. Loughlin, Sally Ivins, Katherine Mills, Lauren Dembnicki Massey, Bryce B. Reeve, Michelle L. Hernandez