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[Consensus statement on the application of rTMS in depression in the Netherlands and Belgium].

Arns M, Bervoets C, van Eijndhoven P, Baeken C, van den Heuvel OA, Aleman A, Schutter DJLG, van der Werf Y, van Belkum S, Sommer IE, van Ruth R, Haarman B, Spijker J, Sack AT.

Tijdschr Psychiatr. 2019;61(6):411-420. Dutch.


A look into hallucinations: the relationship between visual imagery and hallucinations in Alzheimer's disease.

El Haj M, Badcock JC, Jardri R, Larøi F, Roche J, Sommer IE, Gallouj K.

Cogn Neuropsychiatry. 2019 Jun 19:1-9. doi: 10.1080/13546805.2019.1632180. [Epub ahead of print]


High-potency cannabis and incident psychosis: correcting the causal assumption.

Sommer IE, van den Brink W.

Lancet Psychiatry. 2019 Jun;6(6):464-465. doi: 10.1016/S2215-0366(19)30130-0. No abstract available.


An integrated perspective linking physiological and psychological consequences of mild traumatic brain injury.

van der Horn HJ, Out ML, de Koning ME, Mayer AR, Spikman JM, Sommer IE, van der Naalt J.

J Neurol. 2019 Apr 27. doi: 10.1007/s00415-019-09335-8. [Epub ahead of print] Review.


Musical hallucinations and their relation with epilepsy.

Coebergh JAF, Lauw RF, Sommer IEC, Blom JD.

J Neurol. 2019 Jun;266(6):1501-1515. doi: 10.1007/s00415-019-09289-x. Epub 2019 Apr 10.


Dysregulation of the gut-brain axis in schizophrenia and bipolar disorder: probiotic supplementation as a supportive treatment in psychiatric disorders.

Genedi M, Janmaat IE, Haarman BBCM, Sommer IEC.

Curr Opin Psychiatry. 2019 May;32(3):185-195. doi: 10.1097/YCO.0000000000000499.


MRI investigation of immune dysregulation in schizophrenia.

Gangadin SS, Nasib LG, Sommer IEC, Mandl RCW.

Curr Opin Psychiatry. 2019 May;32(3):164-169. doi: 10.1097/YCO.0000000000000498.


Aberrant resting-state oscillatory brain activity in Parkinson's disease patients with visual hallucinations: An MEG source-space study.

Dauwan M, Hoff JI, Vriens EM, Hillebrand A, Stam CJ, Sommer IE.

Neuroimage Clin. 2019;22:101752. doi: 10.1016/j.nicl.2019.101752. Epub 2019 Mar 13.


Volume increase in the dentate gyrus after electroconvulsive therapy in depressed patients as measured with 7T.

Nuninga JO, Mandl RCW, Boks MP, Bakker S, Somers M, Heringa SM, Nieuwdorp W, Hoogduin H, Kahn RS, Luijten P, Sommer IEC.

Mol Psychiatry. 2019 Mar 12. doi: 10.1038/s41380-019-0392-6. [Epub ahead of print]


Neuroimaging auditory verbal hallucinations in schizophrenia patient and healthy populations.

Di Biase MA, Zhang F, Lyall A, Kubicki M, Mandl RCW, Sommer IE, Pasternak O.

Psychol Med. 2019 Feb 20:1-10. doi: 10.1017/S0033291719000205. [Epub ahead of print]


Extrinsic and default mode networks in psychiatric conditions: Relationship to excitatory-inhibitory transmitter balance and early trauma.

Allen P, Sommer IE, Jardri R, Eysenck MW, Hugdahl K.

Neurosci Biobehav Rev. 2019 Apr;99:90-100. doi: 10.1016/j.neubiorev.2019.02.004. Epub 2019 Feb 12. Review.


Constructing the Immune Signature of Schizophrenia for Clinical Use and Research; An Integrative Review Translating Descriptives Into Diagnostics.

Kroken RA, Sommer IE, Steen VM, Dieset I, Johnsen E.

Front Psychiatry. 2019 Jan 31;9:753. doi: 10.3389/fpsyt.2018.00753. eCollection 2018. Review.


[Strong genetic correlation between mental disorders].

Sommer IE, Schoevers RA.

Ned Tijdschr Geneeskd. 2019 Feb 1;162. pii: D3450. Dutch.


Maintenance treatment for patients with a first psychotic episode.

Sommer IEC, Oomen PP, Hasan A.

Curr Opin Psychiatry. 2019 May;32(3):147-156. doi: 10.1097/YCO.0000000000000494.


The Questionnaire for Psychotic Experiences: An Examination of the Validity and Reliability.

Rossell SL, Schutte MJL, Toh WL, Thomas N, Strauss C, Linszen MMJ, van Dellen E, Heringa SM, Teunisse R, Slotema CW, Sommer IEC.

Schizophr Bull. 2019 Feb 1;45(45 Suppl 1):S78-S87. doi: 10.1093/schbul/sby148.


Hallucinations in patients with borderline personality disorder: characteristics, severity, and relationship with schizotypy and loneliness.

Slotema CW, Bayrak H, Linszen MMJ, Deen M, Sommer IEC.

Acta Psychiatr Scand. 2019 May;139(5):434-442. doi: 10.1111/acps.13012. Epub 2019 Feb 25.


Auditory hallucinations, top-down processing and language perception: a general population study.

de Boer JN, Linszen MMJ, de Vries J, Schutte MJL, Begemann MJH, Heringa SM, Bohlken MM, Hugdahl K, Aleman A, Wijnen FNK, Sommer IEC.

Psychol Med. 2019 Jan 4:1-9. doi: 10.1017/S003329171800380X. [Epub ahead of print]


Paracingulate Sulcus Morphology and Hallucinations in Clinical and Nonclinical Groups.

Garrison JR, Fernyhough C, McCarthy-Jones S, Simons JS, Sommer IEC.

Schizophr Bull. 2019 Jun 18;45(4):733-741. doi: 10.1093/schbul/sby157.


Efficacy of different types of cognitive enhancers for patients with schizophrenia: a meta-analysis.

Sinkeviciute I, Begemann M, Prikken M, Oranje B, Johnsen E, Lei WU, Hugdahl K, Kroken RA, Rau C, Jacobs JD, Mattaroccia S, Sommer IE.

NPJ Schizophr. 2018 Oct 25;4(1):22. doi: 10.1038/s41537-018-0064-6.


Neuroinflammation in schizophrenia: meta-analysis of in vivo microglial imaging studies.

Marques TR, Ashok AH, Pillinger T, Veronese M, Turkheimer FE, Dazzan P, Sommer IEC, Howes OD.

Psychol Med. 2018 Oct 25:1-11. doi: 10.1017/S0033291718003057. [Epub ahead of print]


The characteristics of psychotic features in bipolar disorder.

van Bergen AH, Verkooijen S, Vreeker A, Abramovic L, Hillegers MH, Spijker AT, Hoencamp E, Regeer EJ, Knapen SE, Riemersma-van der Lek RF, Schoevers R, Stevens AW, Schulte PFJ, Vonk R, Hoekstra R, van Beveren NJ, Kupka RW, Sommer IEC, Ophoff RA, Kahn RS, Boks MPM.

Psychol Med. 2018 Oct 10:1-13. doi: 10.1017/S0033291718002854. [Epub ahead of print]


Draining the pond and catching the fish: Uncovering the ecosystem of auditory verbal hallucinations.

Looijestijn J, Blom JD, Hoek HW, Renken R, Liemburg E, Sommer IEC, Aleman A, Goekoop R.

Neuroimage Clin. 2018;20:830-843. doi: 10.1016/j.nicl.2018.09.016. Epub 2018 Sep 21.


Clozapine as a first- or second-line treatment in schizophrenia: a systematic review and meta-analysis.

Okhuijsen-Pfeifer C, Huijsman EAH, Hasan A, Sommer IEC, Leucht S, Kahn RS, Luykx JJ.

Acta Psychiatr Scand. 2018 Oct;138(4):281-288. doi: 10.1111/acps.12954. Epub 2018 Sep 14.


Antipsychotic treatments: who is really failing here? - Authors' reply.

Kahn RS, Sommer IE.

Lancet Psychiatry. 2018 Oct;5(10):785-786. doi: 10.1016/S2215-0366(18)30340-7. Epub 2018 Sep 5. No abstract available.


A novel concurrent TMS-fMRI method to reveal propagation patterns of prefrontal magnetic brain stimulation.

Vink JJT, Mandija S, Petrov PI, van den Berg CAT, Sommer IEC, Neggers SFW.

Hum Brain Mapp. 2018 Nov;39(11):4580-4592. doi: 10.1002/hbm.24307. Epub 2018 Aug 29.


Amisulpride and olanzapine followed by open-label treatment with clozapine in first-episode schizophrenia and schizophreniform disorder (OPTiMiSE): a three-phase switching study.

Kahn RS, Winter van Rossum I, Leucht S, McGuire P, Lewis SW, Leboyer M, Arango C, Dazzan P, Drake R, Heres S, Díaz-Caneja CM, Rujescu D, Weiser M, Galderisi S, Glenthøj B, Eijkemans MJC, Fleischhacker WW, Kapur S, Sommer IE; OPTiMiSE study group.

Lancet Psychiatry. 2018 Oct;5(10):797-807. doi: 10.1016/S2215-0366(18)30252-9. Epub 2018 Aug 13.


Auditory Verbal Hallucinations in Borderline Personality Disorder and the Efficacy of Antipsychotics: A Systematic Review.

Slotema CW, Blom JD, Niemantsverdriet MBA, Sommer IEC.

Front Psychiatry. 2018 Jul 31;9:347. doi: 10.3389/fpsyt.2018.00347. eCollection 2018.


The efficacy of computerized cognitive drill and practice training for patients with a schizophrenia-spectrum disorder: A meta-analysis.

Prikken M, Konings MJ, Lei WU, Begemann MJH, Sommer IEC.

Schizophr Res. 2019 Feb;204:368-374. doi: 10.1016/j.schres.2018.07.034. Epub 2018 Aug 7.


Efficacy of typical and atypical antipsychotic medication on hostility in patients with psychosis-spectrum disorders: a review and meta-analysis.

Faay MDM, Czobor P, Sommer IEC.

Neuropsychopharmacology. 2018 Nov;43(12):2340-2349. doi: 10.1038/s41386-018-0161-2. Epub 2018 Jul 23. Review.


Clinical significance of auditory hallucinations in youth: Comparison between a general population and a help-seeking sample.

Maijer K, Steenhuis LA, Lotgering R, Palmen SJMC, Sommer IEC, Bartels-Velthuis AA.

Schizophr Res. 2019 Feb;204:460-461. doi: 10.1016/j.schres.2018.07.027. Epub 2018 Jul 25. No abstract available.


[Believe in what you practice].

Sommer IE, Evers AWM.

Ned Tijdschr Geneeskd. 2018 Jun 29;162. pii: D2806. Dutch.


Understanding hallucinations in probable Alzheimer's disease: Very low prevalence rates in a tertiary memory clinic.

Linszen MMJ, Lemstra AW, Dauwan M, Brouwer RM, Scheltens P, Sommer IEC.

Alzheimers Dement (Amst). 2018 Apr 21;10:358-362. doi: 10.1016/j.dadm.2018.03.005. eCollection 2018.


Immediate and long-term effects of bilateral electroconvulsive therapy on cognitive functioning in patients with a depressive disorder.

Nuninga JO, Claessens TFI, Somers M, Mandl R, Nieuwdorp W, Boks MP, Bakker S, Begemann MJH, Heringa S, Sommer IEC.

J Affect Disord. 2018 Oct 1;238:659-665. doi: 10.1016/j.jad.2018.06.040. Epub 2018 Jun 20.


Cortical Brain Abnormalities in 4474 Individuals With Schizophrenia and 5098 Control Subjects via the Enhancing Neuro Imaging Genetics Through Meta Analysis (ENIGMA) Consortium.

van Erp TGM, Walton E, Hibar DP, Schmaal L, Jiang W, Glahn DC, Pearlson GD, Yao N, Fukunaga M, Hashimoto R, Okada N, Yamamori H, Bustillo JR, Clark VP, Agartz I, Mueller BA, Cahn W, de Zwarte SMC, Hulshoff Pol HE, Kahn RS, Ophoff RA, van Haren NEM, Andreassen OA, Dale AM, Doan NT, Gurholt TP, Hartberg CB, Haukvik UK, Jørgensen KN, Lagerberg TV, Melle I, Westlye LT, Gruber O, Kraemer B, Richter A, Zilles D, Calhoun VD, Crespo-Facorro B, Roiz-Santiañez R, Tordesillas-Gutiérrez D, Loughland C, Carr VJ, Catts S, Cropley VL, Fullerton JM, Green MJ, Henskens FA, Jablensky A, Lenroot RK, Mowry BJ, Michie PT, Pantelis C, Quidé Y, Schall U, Scott RJ, Cairns MJ, Seal M, Tooney PA, Rasser PE, Cooper G, Shannon Weickert C, Weickert TW, Morris DW, Hong E, Kochunov P, Beard LM, Gur RE, Gur RC, Satterthwaite TD, Wolf DH, Belger A, Brown GG, Ford JM, Macciardi F, Mathalon DH, O'Leary DS, Potkin SG, Preda A, Voyvodic J, Lim KO, McEwen S, Yang F, Tan Y, Tan S, Wang Z, Fan F, Chen J, Xiang H, Tang S, Guo H, Wan P, Wei D, Bockholt HJ, Ehrlich S, Wolthusen RPF, King MD, Shoemaker JM, Sponheim SR, De Haan L, Koenders L, Machielsen MW, van Amelsvoort T, Veltman DJ, Assogna F, Banaj N, de Rossi P, Iorio M, Piras F, Spalletta G, McKenna PJ, Pomarol-Clotet E, Salvador R, Corvin A, Donohoe G, Kelly S, Whelan CD, Dickie EW, Rotenberg D, Voineskos AN, Ciufolini S, Radua J, Dazzan P, Murray R, Reis Marques T, Simmons A, Borgwardt S, Egloff L, Harrisberger F, Riecher-Rössler A, Smieskova R, Alpert KI, Wang L, Jönsson EG, Koops S, Sommer IEC, Bertolino A, Bonvino A, Di Giorgio A, Neilson E, Mayer AR, Stephen JM, Kwon JS, Yun JY, Cannon DM, McDonald C, Lebedeva I, Tomyshev AS, Akhadov T, Kaleda V, Fatouros-Bergman H, Flyckt L; Karolinska Schizophrenia Project, Busatto GF, Rosa PGP, Serpa MH, Zanetti MV, Hoschl C, Skoch A, Spaniel F, Tomecek D, Hagenaars SP, McIntosh AM, Whalley HC, Lawrie SM, Knöchel C, Oertel-Knöchel V, Stäblein M, Howells FM, Stein DJ, Temmingh HS, Uhlmann A, Lopez-Jaramillo C, Dima D, McMahon A, Faskowitz JI, Gutman BA, Jahanshad N, Thompson PM, Turner JA.

Biol Psychiatry. 2018 Nov 1;84(9):644-654. doi: 10.1016/j.biopsych.2018.04.023. Epub 2018 May 14.


Successful treatment of intractable visual hallucinations with 5-HT 2A antagonist ketanserin.

Sommer IEC, Kleijer H, Visser L, van Laar T.

BMJ Case Rep. 2018 Jun 27;2018. pii: bcr-2018-224340. doi: 10.1136/bcr-2018-224340.


Prescription and Underprescription of Clozapine in Dutch Ambulatory Care.

van der Zalm YC, Termorshuizen F, Schulte PF, Bogers JP, Marcelis M, Sommer IE, Selten JP.

Front Psychiatry. 2018 Jun 11;9:231. doi: 10.3389/fpsyt.2018.00231. eCollection 2018.


Treating auditory hallucinations with transcranial direct current stimulation in a double-blind, randomized trial.

Koops S, Blom JD, Bouachmir O, Slot MI, Neggers B, Sommer IE.

Schizophr Res. 2018 Nov;201:329-336. doi: 10.1016/j.schres.2018.06.010. Epub 2018 Jun 20.


Differential Resting-State Connectivity Patterns of the Right Anterior and Posterior Dorsolateral Prefrontal Cortices (DLPFC) in Schizophrenia.

Chechko N, Cieslik EC, Müller VI, Nickl-Jockschat T, Derntl B, Kogler L, Aleman A, Jardri R, Sommer IE, Gruber O, Eickhoff SB.

Front Psychiatry. 2018 May 28;9:211. doi: 10.3389/fpsyt.2018.00211. eCollection 2018.


Clinical use of semantic space models in psychiatry and neurology: A systematic review and meta-analysis.

de Boer JN, Voppel AE, Begemann MJH, Schnack HG, Wijnen F, Sommer IEC.

Neurosci Biobehav Rev. 2018 Oct;93:85-92. doi: 10.1016/j.neubiorev.2018.06.008. Epub 2018 Jun 8.


Response to initial antipsychotic treatment in first episode psychosis is related to anterior cingulate glutamate levels: a multicentre 1H-MRS study (OPTiMiSE).

Egerton A, Broberg BV, Van Haren N, Merritt K, Barker GJ, Lythgoe DJ, Perez-Iglesias R, Baandrup L, Düring SW, Sendt KV, Stone JM, Rostrup E, Sommer IE, Glenthøj B, Kahn RS, Dazzan P, McGuire P.

Mol Psychiatry. 2018 Nov;23(11):2145-2155. doi: 10.1038/s41380-018-0082-9. Epub 2018 Jun 7.


Childhood abuse and white matter integrity in bipolar disorder patients and healthy controls.

Stevelink R, Abramovic L, Verkooijen S, Begemann MJH, Sommer IEC, Boks MP, Mandl RCW, van Haren NEM, Vinkers CH.

Eur Neuropsychopharmacol. 2018 Jul;28(7):807-817. doi: 10.1016/j.euroneuro.2018.05.003. Epub 2018 Jun 2.


Preventive strategies for mental health.

Arango C, Díaz-Caneja CM, McGorry PD, Rapoport J, Sommer IE, Vorstman JA, McDaid D, Marín O, Serrano-Drozdowskyj E, Freedman R, Carpenter W.

Lancet Psychiatry. 2018 Jul;5(7):591-604. doi: 10.1016/S2215-0366(18)30057-9. Epub 2018 May 15. Review.


EEG-based neurophysiological indicators of hallucinations in Alzheimer's disease: Comparison with dementia with Lewy bodies.

Dauwan M, Linszen MMJ, Lemstra AW, Scheltens P, Stam CJ, Sommer IE.

Neurobiol Aging. 2018 Jul;67:75-83. doi: 10.1016/j.neurobiolaging.2018.03.013. Epub 2018 Mar 19.


Comorbid Diagnosis of Psychotic Disorders in Borderline Personality Disorder: Prevalence and Influence on Outcome.

Slotema CW, Blom JD, Niemantsverdriet MBA, Deen M, Sommer IEC.

Front Psychiatry. 2018 Mar 14;9:84. doi: 10.3389/fpsyt.2018.00084. eCollection 2018.


Auditory hallucinations in adults with hearing impairment: a large prevalence study.

Linszen MMJ, van Zanten GA, Teunisse RJ, Brouwer RM, Scheltens P, Sommer IE.

Psychol Med. 2019 Jan;49(1):132-139. doi: 10.1017/S0033291718000594. Epub 2018 Mar 20.


Toward personalized treatment of hallucinations.

Sommer IE, Kleijer H, Hugdahl K.

Curr Opin Psychiatry. 2018 May;31(3):237-245. doi: 10.1097/YCO.0000000000000416. Review.


Glucocorticoids and the risk of schizophrenia spectrum disorder in childhood and adolescence - A Danish nationwide study.

Broberg BV, Sommer IE, Benros ME, Glenthøj BY, Gasse C, Köhler-Forsberg O.

Schizophr Res. 2018 Sep;199:116-122. doi: 10.1016/j.schres.2018.03.007. Epub 2018 Mar 9.


[Personalised medicine for psychosis].

Veling W, Sommer IEC, Bruggeman R, de Haan L.

Tijdschr Psychiatr. 2018;60(3):161-165. Review. Dutch.


Minimum spanning tree analysis of the human connectome.

van Dellen E, Sommer IE, Bohlken MM, Tewarie P, Draaisma L, Zalesky A, Di Biase M, Brown JA, Douw L, Otte WM, Mandl RCW, Stam CJ.

Hum Brain Mapp. 2018 Jun;39(6):2455-2471. doi: 10.1002/hbm.24014. Epub 2018 Feb 21.


Training switching focus with a mobile-application by a patient suffering from AVH, a case report.

Visser L, Sinkeviciute I, Sommer IE, Bless JJ.

Scand J Psychol. 2018 Feb;59(1):59-61. doi: 10.1111/sjop.12415.


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