About the Authors

Marina Grigorova

Affiliation Human Molecular Genetics Research Group, Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia

Margus Punab

Affiliation Andrology Unit, Tartu University Hospital, Tartu, Estonia

Anna Maria Punab

Affiliation Human Molecular Genetics Research Group, Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia

Olev Poolamets

Affiliation Andrology Unit, Tartu University Hospital, Tartu, Estonia

Vladimir Vihljajev

Affiliation Andrology Unit, Tartu University Hospital, Tartu, Estonia

Birutė Žilaitienė

Affiliation Institute of Endocrinology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania

Juris Erenpreiss

Affiliation Andrology Laboratory, Riga Stradins University, Riga, Latvia

Valentinas Matulevičius

Affiliation Institute of Endocrinology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania

Maris Laan

maris.laan@ut.ee

Affiliation Human Molecular Genetics Research Group, Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ML MP MG. Performed the experiments: MG AMP. Analyzed the data: MG ML MP. Contributed reagents/materials/analysis tools: ML MP. Wrote the paper: ML MG MP. Recruitment and clinical phenotyping of patients: MP OP VV BŽ JE VM. Critical commenting of the data and manuscript: AMP OP VV BŽ JE VM