SERPINA1 and alpha 1-antitrypsin deficiency: In the group of patients with moderate AATD, 8 patients (50%) with the genotype Pi SZ, 4 patients (25.0%) with rare variants (Pi P-Lowell/Lowell, Pi ZP-Lowell, Pi SM procida, Pi ZI), 3 patients with the genotype Pi MZ (18.8%) and 1 patient (6.3%) with an unknown genotype were included.