This is a prospective observational study. The investigators plan to utilize this model as a tool for early classification and interrogate ANS function of transplant recipients.
Patients must be > 16 years of age;
Patients receiving HLA-haploidentical transplants;
Patients have to sign an informed consent form before the start of the research procedure.
Tandem transplantation or multiple transplantations;
Mental or other medical conditions that make the patients unable to comply with the research treatment and monitoring requirements;
Patients who are ineligible for the study due to other factors, or will bear great risk if participating in the study.