1Faculty of Medicine, Institute of Pathology, University of Ljubljana, Ljubljana, Slovenia
2General Hospital Celje, Celje, Slovenia
Correspondence: Nina Zidar, MD, PhD, Faculty of Medicine, Institute of Pathology, University of Ljubljana, Korytkova 2, Ljubljana 1000, Slovenia. E-mail: firstname.lastname@example.org
Guarantor of the article: Nina Zidar, MD, PhD.
Specific author contribution: Conducted the study and intertpreted the results: Nina Zidar; collected the data and biopsies: Katja Tepeš; approval of final draft submitted: both authors.
Financial support: None.
Potential competing interests: None.