Łukasz Bułdak is an Assistant Professor at the Department of Internal Medicine and Clinical Pharmacology, Faculty of Medical Science in Katowice, Medical University of Silesia, Katowice, Poland. He graduated from the Silesian Medical Academy in Katowice. He is a member of the Polish Society of Endocrinology. His special areas of interest include thyroid diseases (hyperthyroidism, hypothyroidism, ultrasound, thyroid dysfunction in pregnancy), parathyroid gland diseases, adrenal gland diseases, male hypogonadism, and metabolic diseases (obesity, type 2 diabetes, hypercholesterolemia).