Funding for this research was provided by:
Statutory funds – Department of Endocrinology and Metabolic Diseases, Polish Mother’s Memorial Hospital – Research Institute, Lodz, Poland (-)
Text and Data Mining valid from 2020-01-03
Received: 8 February 2019
Accepted: 23 December 2019
First Online: 3 January 2020
Ethics approval and consent to participate
: The procedures, used in the study, were approved by the Ethical Committee of the Polish Mother’s Memorial Hospital – Research Institute, Poland, and fully informed, written consent was obtained from the patients.
: Not applicable.
: The authors declare that they have no competing interests.