By ROGER DOBSON FOR THE DAILY MAIL PUBLISHED: 20:58 EDT, 10 October 2022 | UPDATED: 21:10 EDT, 10 October 2022 A three-minute daily burst of a mild electromagnetic current can ease difficult-to-treat depression, according to a new study. Patients found their symptoms improved significantly, including those who had tried up to six types of antidepressants without success, and some remained symptom-free...