Kula, Krzysztof, Department of Andrology and Reproductive Endocrinology, Medical University of Lodz Kulbacka, J. Kulbacka, Julita Kulbacka, Julita Kulczycka, Magdalena Kulczycka, Malgorzata Kulesza, Joanna, Department of Clinical Cytology, Medical Center of Postgraduate Education, Warszawa, Poland Kuliczkowski, Kazimierz Kulig, Andrzej Kulig, Jan, First Department of General, Oncological and Gastrointestinal Surgery, Jagiellonian University Medical College, Krakow Kulig, Karolina Kulikowski, Marek Kulwikowska, Patrycja, INVICTA Fertility and Reproductive Center, Gdansk, Warsaw, Wroclaw, Poland; Department of Obstetrics and Gynecological Nursing, Faculty of Health Sciences, Medical University of Gdansk, Poland Kulwikowska, Patrycja M., INVICTA Fertility and Reproductive Center, Gdansk Department of Obstetrics and Gynecological Nursing, Faculty of Health Sciences, Medical University of Gdansk Kunert-Keil, Christiane Kunert-Radek, Jolanta Kupisz, Krzysztof Kups, Michal Kuramitsu, Yasuhiro Kurnatowska, Ilona Kurnik, Magdalena, Department of Pathophysiology, Jagiellonian University Medical College, Krakow, Poland Kurnol, Krzysztof, Department of Histology and Embryology, Medical University, Wroclaw Kurpas, Donata, Family Medicine Department, Wroclaw Medical University, Poland; Public Higher Medical Professional School in Opole, Poland Kurpisz, Maciej Kurpisz, Maciej, Department of Reproductive Biology and Stem Cells, Institute of Human Genetics Polish Academy of Sciences, Poznan, Poland (Poland)