Support groups are organizations of people who share a common disorder, like depression or anxiety, and who meet together to discuss their experiences, share ideas, and provide emotional support for one another. Usually a support group is led by a member who has had some training in facilitating group discussions. Unlike formal group therapy, self-help support groups are usually not led by a professional therapist (such as a social worker, psychologist, nurse, or psychiatrist) but nevertheless can be a helpful coping tool to complement formal treatment. For some types of problems, such as bereavement after the death of a loved one, or coping with a chronic medical condition like cancer, hospitals or community agencies often provide support groups led by a social worker or other counselor.