Dal Negro, Roberto W., and Massimiliano Povero. “Cultural and Linguistic Validation of the NHQ-2 Questionnaire: A Specific Instrument for Assessing patient’s Usability of Inhalation Devices”. Multidisciplinary Respiratory Medicine 11, no. 1 (August 23, 2016). Accessed July 7, 2024. https://mrmjournal.org/index.php/mrm/article/view/325.