Fendler, Wojciech, Department of Paediatrics, Oncology, Haematology and Diabetology, Medical University of Lodz, Lodz, Poland Fendler, Wojciech Fendler, Wojciech Feng, Cong Feng, Fang Feng, Shaohua Feng, Shi-Ya Feng, Wenli feng, Xuewen Feng, Yan Feng, Ziyun Feng-Hsuan, Liu, Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, College of Medicine, Taiwan Ferlito, Alfio Fernandes, Sara Fernandez, Socorro, University Veracruzana. Fernández-Soto, María L. Ferreira, Ana Bernardo Ferreira, Inês Ferreira, Sofia Ferreira, Sofia (Portugal) Ferreira, Teresa C. Ferreras, Cristina Fica, Simona, Department of Endocrinology, University of Medicine and Pharmacy “Carol Davila”, Bucharest, Romania Fica, Simona Fichna, Marta