6. Female patients pregnant or breastfeeding (pregnancy should be ruled by an assay of βhCG plasma within 7 days prior to administration of the conjugate). Patients with reproductive potential and who are sexually active must agree to have at least two methods of contraception for the duration of treatment (2 weeks before and 8 12 weeks after the administration of SGM-101) Male patients, must use an effective method of contraception (condom with spermicidal foam or gel; true abstinence; or vasectomy throughout the study and up to 12 weeks after last SGM-101 administration).