A "major milestone" for treating severe depression

Scientists have the results of the first ever large-scale clinical trial of a new form of treatment for severe, treatment-resistant depression, called magnetic seizure therapy. They found it's as effective as electroconvulsive therapy (ECT), which is currently considered the gold standard. We talk to Dr. Daniel Blumberger of the Centre for Addiction and Mental Health in Toronto, also the co-lead of the study, about how this treatment can change lives.