Treffers, E., Duijndam, S. N. C., Schiffer, A. A. J., Scherders, M. J., Habibovic, M., & Denollet, J. (2021). Validity of the 15-item social inhibition questionnaire in outpatients receiving psychological or psychiatric treatment: The association between social inhibition and affective symptoms. General Hospital Psychiatry: Psychiatry, Medicine and Primary Care, 73, 1-8.