About the Authors

Sena Karachanak

Contributed equally to this work with: Sena Karachanak, Viola Grugni

Affiliations Department of Medical Genetics, Medical University of Sofia, Sofia, Bulgaria, Dipartimento di Biologia e Biotecnologie “L. Spallanzani”, Università di Pavia, Pavia, Italy

Viola Grugni

Contributed equally to this work with: Sena Karachanak, Viola Grugni

Affiliation Dipartimento di Biologia e Biotecnologie “L. Spallanzani”, Università di Pavia, Pavia, Italy

Simona Fornarino

Affiliation Dipartimento di Biologia e Biotecnologie “L. Spallanzani”, Università di Pavia, Pavia, Italy

Desislava Nesheva

Affiliation Department of Medical Genetics, Medical University of Sofia, Sofia, Bulgaria

Nadia Al-Zahery

Affiliation Dipartimento di Biologia e Biotecnologie “L. Spallanzani”, Università di Pavia, Pavia, Italy

Vincenza Battaglia

Affiliation Dipartimento di Biologia e Biotecnologie “L. Spallanzani”, Università di Pavia, Pavia, Italy

Valeria Carossa

Affiliation Dipartimento di Biologia e Biotecnologie “L. Spallanzani”, Università di Pavia, Pavia, Italy

Yordan Yordanov

Affiliation Institute of Experimental Morphology and Anthropology with Museum, Bulgarian Academy of Sciences, Sofia, Bulgaria

Antonio Torroni

Affiliation Dipartimento di Biologia e Biotecnologie “L. Spallanzani”, Università di Pavia, Pavia, Italy

Angel S. Galabov

Affiliation The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria

Draga Toncheva

dragatoncheva@gmail.com (DT); ornella.semino@unipv.it (OS)

Affiliation Department of Medical Genetics, Medical University of Sofia, Sofia, Bulgaria

Ornella Semino

dragatoncheva@gmail.com (DT); ornella.semino@unipv.it (OS)

Affiliation Dipartimento di Biologia e Biotecnologie “L. Spallanzani”, Università di Pavia, Pavia, Italy

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

performed sample collection: SK DN DT Discussed the results: SK VG SF DN NAZ VB VC AT AG YY DT OS Provided comments on the manuscript: SK VG SF DN NAZ VB VC AT AG YY DT OS. Conceived and designed the experiments: OS DT. Performed the experiments: SK VG SF DN NAZ VB VC. Analyzed the data: SK VG OS DT AT AG YY. Contributed reagents/materials/analysis tools: OS AT DT. Wrote the paper: SK VG OS DT AG AT.