Document is current
Any future updates will be listed below
-
Authors
Pencheva, Daliya Tsvetanova https://orcid.org/0000-0002-6590-7100
Johnstone, Ellie https://orcid.org/0009-0008-5764-7557
Grzeda, Mariusz T. https://orcid.org/0000-0003-2777-8763
Boyadzhieva, Vladimira https://orcid.org/0000-0002-6780-5810
Stoilov, Nikolay https://orcid.org/0000-0001-7183-086X
Ivanova, Mariana https://orcid.org/0000-0002-0441-3043
- License Information
-
More Information
Article History
Received: 11 August 2025
Accepted: 20 February 2026
First Online: 24 February 2026
Declarations
:
: This study was performed in accordance with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee at University Hospital “St. Ivan Rilski” (approval reference number 01/11.02.2025). Written informed consent in Bulgarian was obtained from all participants. Permission to use the ASQoL was obtained from Galen Research Ltd, the copyright holder of the ASQoL and all its language versions.
: Not applicable.
: The authors declare no competing interests.
