Gun-control laws that require mental health professionals to report mentally ill people who are likely to harm others are unlikely to make a dent in gun violence, health researchers say.

In the two months since the Newtown, Conn., school shooting, lawmakers across the country have been grappling with ways to prevent gun violence, including proposals to prevent more mentally ill people from buying guns.

New York state’s sweeping gun-control law requires mental health professionals to report the names of patients likely to seriously harm themselves or others.

A Maryland state task force also recommended a proposal— ultimately rejected by the governor — requiring psychiatrists, teachers and others to report people who threaten “suicide or serious violence” to authorities.