HSCT =haematopoietic stem-cell transplantation. *Four patients received one cycle of brentuximab vedotin with ifosfamide, carboplatin, and etoposide; one patient received one cycle of ifosfamide, carboplatin, and etoposide; two patients received two cycles of gemcitabine, vinorelbine, and liposomal doxorubicin; and one patient received two cycles of brentuximab vedotin with bendamustine.