The investigators will obtain the following information from the patient's medical records: clinical factors including age at presentation, gender, clinical presentation, laboratory and pathology data, lymphoma diagnosis, clinical staging criteria, anti-cancer therapy as well as supportive care medicines, complications of therapy (adverse events graded from CTCAE v4.0), and hematopoietic stem cell transplantation therapy (chemotherapy, donor source, cell dose), course (engraftment, GVHD, chimerism), and follow-up (disease status).
