Association of MTHFR polymorphism, folic acid and vitamin B12 with serum homocysteine levels in pregnant women oleh Ana Bošković, Ana Ćuk, Vedrana Mandrapa, Ana Dugandžić Šimić, Ivona Cvetković, Martina Orlović Vlaho, Tanja Krešić, Tanja Tomić, Vajdana Tomić