ID-1, ID-2 and ID-3 mRNA levels in ovarian cancers classified according to clinical stage and histopathological type. Clinical staging of ovarian cancers was done according to FIGO. Each level is the mean ± SD of nine determinations. C, clear cell carcinoma; E, endometrioid adenocarcinoma; MCY, mucinous cystadenocarcinoma; SCY, serous cystadenocarcinoma, SPCY, serous papillary cystadenocarcinoma. Alive and deceased cases are numbered in open circles and closed circles, respectively. * p < 0.001.