SERPINA1 and alpha 1-antitrypsin deficiency: The study population consisted of 22 AATD individuals (9 male, 13 female) with a mean serum AAT level of 5.2 \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\pm$$\end{document}± 0.2 μM.