In the late 1960s, the World Health Organization initiated a series of international studies of the incidence, characteristics, course, and consequences of schizophrenia. Those studies - the largest ever in the history of psychiatry - provided important data about the disorder in groups of patients living in different countries and cultures, and first focused attention on the differences in short-term prognosis for schizophrenia between the third world and industrialized countries. In the 1990s, the International Study of Schizophrenia (ISoS) set out to relocate those subjects and to...