α1-Antitrypsin (AAT) therapy considerations: a) practical difficulties with AAT infusions; b) concerns regarding AAT doses >60 mg·kg−1 per week. α1-Antitrypsin (AAT) therapy considerations: a) practical difficulties with AAT infusions; b) concerns regarding AAT doses >60 mg·kg−1 per week. Data are presented as percentage of respondents; physicians could choose more than one concern regarding AAT doses >60 mg·kg−1. No AAT products were specified and there was no agreed definition on what constituted a lengthy infusion time. Ildikó Horváth et al. ERJ Open Res 2019;5:00171-2018 ©2019 by European Respiratory Society