Wigman, J. T. W., van Nierop, M., Vollebergh, W. A. M., Lieb, R., Beesdo-Baum, K., Wittchen, H., & van Os, J. (2012). Evidence That Psychotic Symptoms Are Prevalent in Disorders of Anxiety and Depression, Impacting on Illness Onset, Risk, and Severity—Implications for Diagnosis and Ultra–High Risk Research. Oxford University Press.

Wigman, Johanna T. W., Martine van Nierop, Wilma A. M. Vollebergh, Roselind Lieb, Katja Beesdo-Baum, Hans-Ullrich Wittchen, and Jim van Os. Evidence That Psychotic Symptoms Are Prevalent in Disorders of Anxiety and Depression, Impacting On Illness Onset, Risk, and Severity—Implications for Diagnosis and Ultra–High Risk Research. Oxford University Press, 2012.

Wigman, Johanna T. W., et al. Evidence That Psychotic Symptoms Are Prevalent in Disorders of Anxiety and Depression, Impacting On Illness Onset, Risk, and Severity—Implications for Diagnosis and Ultra–High Risk Research. Oxford University Press, 2012.