Vietnam_Era_Twin_Registry
Vietnam Era Twin Registry
Twin registry of American veterans of the Vietnam War
The Vietnam Era Twin Registry (abbreviated VET Registry) is a twin registry containing 7,369 male-male twin pairs who served in the United States Armed Forces during the Vietnam War (defined as the period from 1964 to 1975). As of 2013, it is one of the largest national adult twin samples in the United States.[1] All of the twins in the registry were born between 1939 and 1955.[2] Though it was originally formed to study the effects of military service on health, it has since been widely used to study the role of genetics in many specific mental and physical illnesses.[3]