Healthy control group
MDD, Axis I Disorders, DSM-IV-TR, mental illness
MAY, DISEASE
Healthy participants who met the healthy group version of the MDD standard clinical criteria in the DSM-IV-TR (Structured Clinical Interview for DSM-IV Axis I Disorders, Non-Patient Edition) were publicly recruited from October 2015 to May 2018. All assessments and diagnoses were verified by two psychiatrists. The inclusion criteria were: (1) aged 18–55 years; (2) right-hand dominant; (3) volunteer and had signed the informed consent. The exclusion criteria were: (1) serious physical disease; (2) personal and/or family history of mental illness; and (3) contraindication for MRI.