Smoking and obsessive–compulsive symptoms in patients with schizophrenia, schizoaffective disorder or bipolar disorder using electronic mental health records
Cohen, H.R., Chang, C., Ahn-Robbins, D., Bogdanowicz, K., Vermeulen, J.M.,
Schirmbeck, F.,
De Haan, L., Hayes, R.D. & et. al.
Verschenen in BJPsych Open (2026)
Interrelationships of long-term changes in recovery domains among patients with schizophrenia spectrum disorders: a six-year follow-up study
de Winter, L., Jelsma, A., Vermeulen, J.M.,
Vellinga, A.,
Van der Pluijm, M., van Weeghel, J., Hasson-Ohayon, I., Mulder, C.M., Boonstra, N., Veling, W.,
De Haan, L. & GROUP onderzoekers
Verschenen in BMC Psychiatry, 25 (2025)
Delivery and delay of guideline pharmacological, psychological, and social interventions for adults with complex psychosis in Dutch inpatient rehabilitation units: A retrospective study
Burger, T.,
De Haas, H.J.,
Van Eck, R.,
Kikkert, M.J.,
Schirmbeck, F.,
Vellinga, A.,
De Haan, L. &
De Koning, M.B.Verschenen in International Journal of Social Psychiatry (2025)
Perspectives of Patients With Early Psychosis on the Use of an App in Acceptance and Commitment Therapy: A Qualitative Study
Bouws, J., Uyttebroek, L., Beames, J.R.,
De Koning, M.B.,
Schirmbeck, F., Henrard, A., Reininghaus, U.,
De Haan, L. & Myin-Germeys, I.
Verschenen in Early Intervention in Psychiatry, 19 (8) (2025)
Clinical treatment interventions in personal recovery stories of patients with severe mental illness: a qualitative study
Van Eck, R., Jelsma, A., Blondeel, J., de Wilde-Schutten, K., Zondervan, J.V.R.,
Burger, T.,
Vellinga, A.,
De Koning, M.B.,
Schirmbeck, F., Gerritsen, S.,
Kikkert, M.J. &
De Haan, L.Verschenen in Social Psychiatry and Psychiatric Epidemiology (2025)
The Association Between Change in Symptom Severity and Personal Recovery in Patients With Severe Mental Illness
Van Eck, R., Jelsma, A., Blondeel, J.,
Burger, T.,
Vellinga, A.,
De Koning, M.B.,
Schirmbeck, F.,
Kikkert, M.J., Boyette, L. &
De Haan, L.Verschenen in The Journal of Nervous and Mental Disease (2024)
Perspective matters in recovery: the views of persons with severe mental illness, family and mental health professionals on collaboration during recovery, a qualitative study
Burger, T.,
Van Eck, R., Lachmeijer, M., de Wilde-Schutten, K.R.G., Lansen, M., van Alphen, C., van Haasteren, N., Groen, K.,
Schirmbeck, F.,
Vellinga, A.,
Kikkert, M.J.,
Dekker, J.J.M.,
De Haan, L. &
De Koning, M.B.Verschenen in BMC Psychiatry, 24 (2024)
Ruimte in regels: juridische kaders van onderzoek met bestaande patiëntgegevens
De Koning, M.B.,
Burger, T.,
Vellinga, A.,
Van Eck, R.,
Kikkert, M.J.,
De Haan, L. &
De Haas, H.J.Verschenen in Tijdschrift voor Psychiatrie, 66 (10) (2024)
Clozapine levels and outcomes in Serbian patients with treatment-resistant psychotic disorders previously treated without measuring clozapine levels (CLOSER)
De Haas, H.J., Cohen, D.,
De Koning, M.B.,
Van Weringh, G., Petrovic, V.,
De Haan, L., Touw, D.J. & Ristic, D.I.
Verschenen in Psychiatry Research, 339 (2024)
The relationship between substance use and self-reported aspects of social functioning in patients with a psychotic disorder
van der Heijden, S.,
Kikkert, M.J.,
De Haan, L., Segeren, M., Molman, S.,
Schirmbeck, F. & Vermeulen, J.
Verschenen in European Psychiatry (2024)
A Cross-sectional Conceptual Replication and Longitudinal Evaluation of the PANSS-Autism-Severity-Score Measure Suggests it Does Not Capture Autistic Traits in Individuals With Psychosis
Chisholm, K.,
Schirmbeck, F., Pinkham, A.E., Sasson, N.J., Simons, C.J.P.,
De Haan, L., Harvey, P.D., Penn, D.L. & Ziermans, T.
Verschenen in Schizophrenia Bulletin (2023)
Age-Related Social Cognitive Performance in Individuals With Psychotic Disorders and Their First-Degree Relatives
Velthorst, E., Socrates, A., GROUP Investigators, Alizadeh, B.Z., van Amelsvoort, T.,
De Haan, L.,
Schirmbeck, F., van Os, J. & Fett, A.K.
Verschenen in Schizophrenia Bulletin, 49 (6), 1460-1469 (2023)
Risk factors for suicidality across psychosis vulnerability spectrum
Stephan, N.M., van Sprang, E.D., Wiebenga, J.X.M., Dickhoff, J.,
Schirmbeck, F.,
De Haan, L., van Amelsvoort, T., Veling, W. & Heering, H.D.
Verschenen in Schizophrenia Research, 261, 152-160 (2023)
Acceptance and Commitment Therapy for individuals at risk for psychosis or with a first psychotic episode: A qualitative study on patients’ perspectives
Bouws, J., Henrard, A.,
De Koning, M.B.,
Schirmbeck, F., van Ghesel Grothe, S., van Aubel, E., Reininghaus, U.,
De Haan, L. & Myin-Germeys, I.
Verschenen in Early Intervention in Psychiatry, 1-10 (2023)
Personal recovery suits us all: A study in patients with non-affective psychosis, unaffected siblings and healthy controls
Van Eck, R., van Velden, J.,
Vellinga, A., van der Krieke, L., Castelein, S., van Amelsvoort, T., Bruggeman, R., Cahn, W., Simons, C.J.P., van Os, J.,
De Haan, L. &
Schirmbeck, F.Verschenen in Schizophrenia Research, 255, 24-32 (2023)
Associations between genetic liabilities to smoking behavior and schizophrenia symptoms in patients with a psychotic disorder, their siblings and healthy controls
Lin, B.D., Vermeulen, J.M., Bolhuis, K., Chang, X.,
Schirmbeck, F., GROUP Investigators,
Blankers, M.,
De Haan, L. & Luykx, J.J.
Verschenen in Psychiatry Research, 323 (2023)
Oxidative stress in psychosis: a new target for intervention?
Hagen, J.M., Sutterland, A.L., Wezenberg, B.N., Tan, H.L. &
De Haan, L.Verschenen in Tijdschrift Voor Psychiatrie, 64 (1), 38-42 (2022)
De ondervertegenwoordiging van complexe patiëntengroepen in wetenschappelijk onderzoek: ethische overwegingen
De Koning, M.B.,
Burger, T.,
Van Eck, R.,
Kikkert, M.J.,
De Haan, L. &
Vellinga, A.Verschenen in Tijdschrift voor Psychiatrie, 63, 731-736 (2021)
Individualized prediction of three- and six-year outcomes of psychosis in a longitudinal multicenter study: a machine learning approach
de Nijs, J.,
Burger, T., Janssen, R.J., Mostafa Kia, S., van Opstal, D.P.J.,
De Koning, M.B.,
De Haan, L., GROUP Investigators, Cahn, W. & Schnack, H.G.
Verschenen in Nature: Schizophrenia (2021)
To continue or not to continue? Antipsychotic medication maintenance versus dose-reduction/discontinuation in first episode psychosis: HAMLETT, a pragmatic multicenter single-blind randomized controlled trial
Begemann, M.J.H., Thompson, I.A., Veling, W., Gangadin, S.S., Geraets, C.N.W., van 't Hag, E., Müller-Kuperus, S.J., Oomen, P.P., Voppel, A.E., van der Gaag, M.,
Kikkert, M.J., van Os, J., HAMLETT Group,
De Haan, L. & Sommer, I.E.C.
Verschenen in Trials, 21, 147 (2021)
Tapering antipsychotic medication: practical considerations
Horowitz, A., Moncrieff, J.,
De Haan, L., Bogers, J.P.A.M., Gangadin, S.S.,
Kikkert, M.J., Veling, W. & Sommer, I.E.C.
Verschenen in Psychological Medicine, 52 (1) (2021)
Medication strategies in first episode psychosis patients: A survey among psychiatrists
Kikkert, M.J., Veling, W.,
De Haan, L., Begemann, M.J.H.,
De Koning, M.B., HAMLETT and OPHELIA Consortium & Sommer, I.E.
Verschenen in Early Intervention in Psychiatry, 1-8 (2021)
