0:14ABC NewsJuly 30, 2018Researchers working on possible depression blood testA new study reveals a molecular deficiency in the blood of patients with major depressive disorder.Up Next in newsThe 2024 total eclipse seen across North AmericaApril 8, 2024Sandra Day O'Connor, 1st woman on Supreme Court, dies at 93December 1, 20231 year after Club Q tragedy, loved ones share treasured memories of lives lostNovember 19, 2023