Gujski, Mariusz, Department of Prevention of Environmental Hazards and Allergology, Medical University of Warsaw, Poland Gül, Aylin Ege Gul, Nurdan Gül, Özen Öz Gulbahar, Ozlem, Gazi University Faculty of Medicine, Department of Biochemistry, Ankara, Turkey Güldiken, Sibel, Trakya University, Medical Faculty, Internal Medicine Department, Endocrinology and Metabolic Diseases Division, Edirne, Turkey Guler, Ismail Guler, Serdar Guler, Serdar Guler, Tolga Guligowska, Agnieszka Guligowska, Agnieszka Gumprecht, Janusz Gumprecht, Janusz Gumprecht, Janusz, Department of Internal Medicine, Diabetology, and Nephrology, Medical University of Silesia, Katowice Gumprecht, Janusz, Department of Internal Medicine, Diabetology and Nephrology, Medical University of Silesia, Zabrze, Poland (Poland) Gumprecht, Janusz Gunaltili, Gulsah Gunerska-Szadkowska, Anna Guo, Dan Guo, Dandan Guo, Gang Guo, Haijian Guo, Hao Guo, Xin