Why Are Suicide Rates Increasing in the United States? Towards a Multilevel Reimagination of Suicide Prevention?- Barriers for the Research, Prevention, and Treatment of Suicidal Behavior.- The Role of Epigenetic Dysregulation in Suicidal Behaviors.- Suicide: Genetics and Heritability.- Toward a Biosignature of Suicide Reattempt.- Sex, Gender, and Suicidal Behavior.- Neurocognition and the Suicidal Process.- Lipids and Suicide Risk.- Glutamine and New Pharmacological Targets to Treat Suicidal Ideation.- The Role of Opiates in Social Pain and Suicidal Behavior.- Sleep Disturbances and Suicidal Behavior.- Ecological Momentary Assessment for Monitoring Risk of Suicide Behavior.