Replication and refinement of the role of rs548181 in schizophrenia: results from a family based study Derks EM, Ophoff RA, Am. J. Med. Genet. B Neuropsychiatr. Genet. 2013 Jan;162B(1):75-7 PMID: 23193019 Abstract Derks EM, Ophoff RA, Replication and refinement of the role of rs548181 in schizophrenia: results from a family based study11.28.2012