1. Department of Internal Medicine, Medical University of Lublin, Staszica 16, 20-081 Lublin, Poland
2. First Military Hospital, Aleje Raclawickie 23, 20-049 Lublin, Poland
3. Department of Internal Medicine, Metabolic Disorders and Hypertension, Medical University of Poznan, Szamarzewskiego 84, 60-569 Poznan, Poland