Psychometric Properties of the Symptom Questionnaire-48 in Adults with Mild Intellectual Disability or Borderline Intellectual Functioning in Mental Health Care. - van der Heijden, Renate A.; van Zutven, Kim; Verhagen, Inge P.C.; Venhorst, Renate; Nieuwenhuis, Jeanet G.; Korzilius, Hubert P.L.M.; van der Heijden, Paul T.; Didden, Robert (Journal of Mental Health Research in Intellectual Disabilities, 2025)