1. Student Scientific Club of Endocrinology, Poznan University of Medical Sciences, Poznań, Wielkopolskie, Poland and District Hospital in Głogów, Dolnośląskie, Poland
2. Outpatients Clinic of Endocrine Diseases, Wschowa, Lubuskie, Poland
3. Department of Neurology, Chair of Neurology, Poznan University of Medical Sciences, Poznan, Wielkopolskie, Poland
4. Department of Endocrinology, Metabolism and Internal Medicine, Poznań University of Medical Sciences, Poznań, Wielkopolskie, Poland