About the Authors

Sinan Guloksuz

sguloksuz@yahoo.com

Affiliation Department of Psychiatry and Psychology, Maastricht University Medical Centre, EURON, Maastricht, The Netherlands

Marieke Wichers

Affiliation Department of Psychiatry and Psychology, Maastricht University Medical Centre, EURON, Maastricht, The Netherlands

Gunter Kenis

Affiliation Department of Psychiatry and Psychology, Maastricht University Medical Centre, EURON, Maastricht, The Netherlands

Maurice G. V. M. Russel

Affiliation Department of Gastroenterology and Hepatology, Medisch Spectrum Twente, Enschede, The Netherlands

Annick Wauters

Affiliation Laboratory of Clinical Biology, ZNA Middelheim, Antwerp, Belgium

Robert Verkerk

Affiliation Laboratory of Medical Biochemistry, University of Antwerp, Wilrijk, Belgium

Baer Arts

Affiliation Department of Psychiatry and Psychology, Maastricht University Medical Centre, EURON, Maastricht, The Netherlands

Jim van Os

Affiliations Department of Psychiatry and Psychology, Maastricht University Medical Centre, EURON, Maastricht, The Netherlands, King's College London, King's Health Partners, Department of Psychosis Studies, Institute of Psychiatry, London, United Kingdom

Competing Interests

Co-author Jim van Os is a PLOS ONE Editorial Board member. The authors confirm that this does not alter their adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MW JvO MR. Performed the experiments: GK AW RV. Analyzed the data: SG MW JvO. Wrote the paper: SG JvO. Recruited the participants: MR.