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Schmitt JE, Prescott CA, Gardner CO, Neale MC, Kendler KS.Schmitt JE, et al. Among authors: gardner co.Twin Res Hum Genet. 2005 Feb;8(1):60-2. doi: 10.1375/1832427053435346.Twin Res Hum Genet. 2005.PMID: 15836812