Familial liability to psychosis is a risk factor for multimorbidity in people with psychotic disorders and their unaffected siblings

• M.A. Islam
• , M.F.H. Khan
• , P.J. Quee
• , H. Snieder
• , E.R. van den Heuvel
• , R. Bruggeman
• , B.Z. Alizadeh
• , GROUP Investigators
• , N.J. van Beveren
• , W. Cahn
• , L. de Haan
• , P. Delespaul
• , C.J. Meijer
• , I. Myin-Germeys
• , R.S. Kahn
• , F. Schirmbeck
• , C.J.P. Simons
• , N.E. van Haren
• , J. van Os
• , R. van Winkel