Not pregnant and not nursing; for women of childbearing potential only, a negative serum pregnancy test done =< 7 days prior to registration is requiredXx_NEWLINE_xXNot pregnant and not nursing; women of childbearing potential only, a negative pregnancy test done =< 7 days prior to registration is requiredXx_NEWLINE_xXPregnant or nursing; women of childbearing potential must have a negative serum pregnancy test performed within 7 days prior to the start of study therapy* Note: Pregnant women are excluded from this study; breastfeeding should be discontinued if the mother is treated with AZD1775/belinostatXx_NEWLINE_xXNot pregnant and not nursing; for women of childbearing potential only, a negative pregnancy test done =< 7 days prior to registration is requiredXx_NEWLINE_xXNot pregnant and not nursing; therefore, for women of childbearing potential only, a negative pregnancy test done =< 7 days prior to re-registration is requiredXx_NEWLINE_xXNot pregnant and not nursing; for women of childbearing potential only, a negative urine or serum pregnancy test done =< 14 days prior to registration and confirmation they are not nursing is requiredXx_NEWLINE_xXNot pregnant and not nursing; for women of childbearing potential only, a negative pregnancy test done =< 7 days prior to registration is requiredXx_NEWLINE_xXNot pregnant and not nursing; for women of childbearing potential only, a negative pregnancy test done =< 7 days prior to registration is requiredXx_NEWLINE_xXNot pregnant and not nursing; for women of childbearing potential only, a negative urine or serum pregnancy test done =< 8 days prior to registration is requiredXx_NEWLINE_xX