Nov. 30 (UPI) -- Results of a new study show that patients with major depressive order who have not been helped by antidepressants could benefit from short-term use of nitrous oxide, researchers announced Sunday. The study, conducted by the University of Birmingham and published in the the journal eBioMedicine "has assessed the best available clinical information to show how clinically administered nitrous oxide can offer fast-acting depressive symptom relief for adults with major depressive