{"paper_id":"21c51d98-ae95-4dbf-9f95-3d642bf60f9a","body_text":"I dedicate this correspondence to my mother Khadija, my wife Henda and my three daughters Hana, Meriem and Molk.\n\nChronic obstructive pulmonary disease\nForced expiratory volume in one second\nForced vital capacity\nLung function data\nProtease-inhibitor\n\nHBS wrote this correspondence. The author read and approved the final manuscript.\n\nThis research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.\n\nNot applicable.\n\nNot applicable.\nNot applicable.\nThe author declares that his has no conflicts of interest concerning this correspondence.\n\nPublisher’s Note\nSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.\n\nNot applicable.","source_license":"CC-BY-4.0","license_restricted":false}