Stoyanova-Piroth, Galina
Milanov, Ivan
Stambolieva, Katerina
Article History
Received: 2 April 2021
Accepted: 8 September 2021
First Online: 15 September 2021
Declarations
:
: The study protocol was approved by the Ethics Committee of the University Hospital for Active Treatment in Neurology and Psychiatry “St Naum”, Sofia. All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.