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sons this study was so successful is its unprecendented size. Pooling our resources has yielded spectacular results, which is what the participants from three continents hoped for. At the same time, this study underscores the fact that rare variants may well carry a significant part of the genetic risk of schizophrenia, so our next task is to use the ever more affordable sequencing technologies to find more of them," said Kari Stefansson, CEO of deCODE and corresponding author on the paper.
In the first phase of the study, the deCODE-led SGENE consortium conducted a genome-wide scan of more than 300,000 SNPs in a total of 17,000 patients and controls from England, Finland, Germany, Iceland, Italy and Scotland. The 1500 SNPs with the best signal were then analyzed in 11,000 patients and controls from the International Schizophrenia Consortium (ISC) and the European-American portion of the Molecular Genetics of Schizophrenia studies (MGS). Twenty-five SNPs with strong suggestive correlation were then followed up in more than 20,000 patients and controls from the Netherlands, Denmark, Germany, Hungary, Norway, Russia, Finland and Spain. Bringing together the results of different consortia established he association between the the total of seven markers on chromosomes 6, 11, and 18 with increased risk of schizophrenia.
Acknowledgments
deCODE and all of the authors would like to thank the participants who
took part in this study and made it possible. The SGENE consortium and its
affiliated groups include deCODE genetics, the National-University Hospital
in Reykjavik, the SOURCE DeCODE Genetics Inc
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