1 Subjects: “...United States...”

2 Subjects: “...Clinical Trials as Topic...”

3 Subjects: “...Clinical Trials as Topic...”

4 “...Suicide is a major public health concern in the United States (US), claiming over 36,000 lives each...”

5 “...Suicide is a major public health concern in the United States (US), claiming over 36,000 lives each...”

6 “...: Randomized controlled trials and observational studies published between December 1999 and February 2005...”

7 “...: Randomized controlled trials and observational studies published between December 1999 and February 2005...”

8 “... approved by the United States Food and Drug Administration (FDA) in July 2005, is a selective melatonin...”