Exogenous L-glutathione improves vitrification outcomes in murine preimplantation embryos by Abdul Rahman, Nor Shahida, Mohamed Noor Khan, Nor Ashikin, Eshak, Zolkapli, Sarbandi, Mimi Sophia, Mohammad Kamal, Aqila Akmal, Abd Malek, Mastura, Abdullah, Fathiah, Abdullah, Maizaton Atmadini, Othman, Fezah