Fichna, Piotr Fichna, Piotr, Department of Paediatric Diabetes and Obesity, Poznan University of Medical Sciences, Poland Fichna, Piotr Fichna, Piotr, Poznan University of Medical Sciences (Poland) Fiema, Mateusz Fighera, Tayane Muniz, Endocrinology Division, Hospital de Clinicas, Federal University of Parana (SEMPR) Figueiredo, Ana Abrantes Fila-Daniłow, Anna, Department of Medical Genetics, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Katowice Filip, Rafał Filipecka-Tyczka, Dagmara, 2nd Department of Obstetrics and Gynecology, Centre of Medical Postgraduate Education, Warsaw, St. Sophia Hospital in Warsaw Filipiak, Eliza Filipiak, Krzysztof J. Filipowicz, Dorota Filus, Alicja Filus, Alicja, Department of Endocrinology, Diabetes and Radionuclide Treatment, Wroclaw Medical University, Wroclaw, Poland Firek-Pedras, Małgorzata Fiszer, Patryk, Department of General and Endocrine Surgery, Medical University of Warsaw, Poland Fiszer, Patryk, Department of General and Endocrine Surgery, Medical University of Warsaw Florczak, Elżbieta Florczak, Jolanta Florek, Ewa Florek, Ewa (Poland) Florescu, Alexandru Flotyńska, Justyna Foltyn, Wanda