We thank the participants of the study.
There was no external funding for this study itself. Clement Clarke International Limited (CCIL) funded the article processing charges. CCIL is the manufacturer and distributor (direct in UK and through third parties in other countries) of the Trainhaler® and Flo-Tone® devices. All authors had full access to all of the data in this study and take complete responsibility for the integrity of the data and accuracy of the data analysis.
Medical Writing Assistance
Medical writing assistance came from Alexis Harper of Jalcyon Ltd. Clement Clarke International Limited (CCIL) funded the medical writer/editor fluent in English science writing to assist the authors in the presentation of the final text. The scientific authors were provided with successive versions and queries for resolution throughout the editing process.
All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this article, take responsibility for the integrity of the work as a whole, and have given their approval for this version to be published.
Mina Nicola: Experiment, data entry, writing. Ahmed A. Alberry: Concept, study design, and review. Ossama Mohamed Mahmoud Sayed: Concept, study design. Raghda R.S. Hussein: Concept, study design. Haitham Saeed: Modelling. Mohamed E. Abdelrahim: Concept, planning of study design, review, and writing. All authors have read and approved the manuscript.
Mina Nicola, Ahmed Elberry, Ossama Sayed, Raghda Hussein, Haitham Saeed, and Mohamed Abdelrahim have nothing to disclose.
Compliance with Ethics Guidelines
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Ethical approval was obtained from the hospital ethical committee and written consent was given by the patients.
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.