Pietron, Natalia Pietrowska, Karolina Pietrus, Milosz Pietrus, Miłosz Pietryga, Marek, Klinika Położnictwa i Chorób Kobiecych UM w Poznaniu Pietryga, Marek, Klinika Położnictwa i Chorób Kobiecych, Uniwersytet Medyczny im. Karola Marcinkowskiego w Poznaniu. Pietryga, Marek, Department of Obsterics and Woman’s Diseases, University of Medical Sciences, Poznań, Poland Pietryga, Marek, Department of Obstetrics and Women’s Diseases, Poznan University of Medical Sciences, Poznan, Poland Pietryga, Marek Pietryga, Marek, Department of Obstetrics and Gynecology, Poznan University of Medical Sciences, Poznan, Poland Pietryga, Marek, Ultrasound and Prenatal Diagnostic Laboratory, Gynaecology and Obstetrics Hospital of K. Marcinkowski Poznań University of Medical Sciences Pietryga, Marek Pietryga, Marek (Poland) Pietrzak, Aldona, Medical University of Lublin Pietrzak, Aldona Pietrzak, Bronislawa, Ist Department of Obstetrics and Gynecology, Medical University of Warsaw, Poland Pietrzak, Bronislawa Pietrzak, Bronislawa (Poland) Pietrzak, Bronisława Pietrzak, Jakub Pietrzak, Olga Pietrzak, Radoslaw Pietrzak, Zbigniew Pietrzycka, Dorota Pietrzyk, Aleksandra