The Depression Network (DeNT) Study: methodology and sociodemographic characteristics of the first 470 affected sibling pairs from a large multi-site linkage genetic study oleh Preisig Martin, Perry Julia, Owen Mike, Mors Ole, Middleton Lefkos, Maier Wolfgang, Korszun Ania, Gill Mike, Craddock Nick, Brewster Shyama, Breen Gerome, Farmer Anne, Rietschel Marcella, Reich Theodore, Jones Lisa, Jones Ian, McGuffin Peter