Sure. This is first study that I've found. "The findings revealed that social isolation was associated with an increased risk for depressive symptoms, suicide

Sure. This is first study that I've found. "The findings revealed that social isolation was associated with an increased risk for depressive symptoms, suicide attempts, and low self-esteem." http://www.ncbi.nlm.nih.gov/pubmed/17849936 http://www.ncbi.nlm.nih.gov/pubmed/17849936