Figure 1.

Summary drawing of a large pedigree with schizophrenia, from northern Sweden. The total pedigree consists of 3,400 individuals, 520 of whom are shown. The branches drawn were selected because they contain affected individuals who have given consent to be included in the genome scan and their closest relatives. The upper part of the pedigree, drawn in black, shows the first generations in the 17th century and the connections between the four branches drawn below. We have obtained blood samples from and have genotyped all the 210 individuals indicated by gray boxes. For simplicity, deceased individuals are not indicated.