This book comprises the conferences and discussions presented at the 4th sym- posium on the SEARCH FOR THE CAUSES OF SCHIZOPHRENIA, which took place in Guaruja, Brazil, November 1998. This series of symposia started in 1986, on the occasion of the 600th anniversary of the University of Heidelberg, followed by two others in 1989 and 1993. From these meeting resulted three volumes that have been widely used as a reference for comprehensive reviews on...