GNRH1 and colon adenocarcinoma: The in vitro cytostatic effect of GnRH-III–drug conjugates was determined on MCF-7 human breast and HT-29 human colon adenocarcinoma cells by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay as it was described in the published articles [14–15, 20–25].