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Erik Johnsen
Erik Johnsen
Haukeland University Hospital
Verified email at helse-bergen.no
Title
Cited by
Cited by
Year
Stratified medicine for mental disorders
G Schumann, EB Binder, A Holte, ER de Kloet, KJ Oedegaard, ...
European Neuropsychopharmacology 24 (1), 5-50, 2014
2692014
Treatment of schizophrenia with antipsychotics in Norwegian emergency wards, a cross-sectional national study
RA Kroken, E Johnsen, T Ruud, T Wentzel-Larsen, HA Jørgensen
BMC psychiatry 9, 1-9, 2009
1572009
Suicidality in schizophrenia spectrum disorders: the relationship to hallucinations and persecutory delusions
E Kjelby, I Sinkeviciute, R Gjestad, RA Kroken, EM Løberg, HA Jørgensen, ...
European psychiatry 30 (7), 830-836, 2015
1142015
Effectiveness of second generation antipsychotics: a systematic review of randomized trials
E Johnsen, HA Jørgensen
BMC psychiatry 8, 1-14, 2008
962008
Cannabis use is associated with 3 years earlier onset of schizophrenia spectrum disorder in a naturalistic, multi-site sample (N= 1119)
S Helle, PA Ringen, I Melle, TK Larsen, R Gjestad, E Johnsen, ...
Schizophrenia research 170 (1), 217-221, 2016
932016
Constructing the immune signature of schizophrenia for clinical use and research; an integrative review translating descriptives into diagnostics
RA Kroken, IE Sommer, VM Steen, I Dieset, E Johnsen
Frontiers in psychiatry 9, 409313, 2019
842019
The serum level of C-reactive protein (CRP) is associated with cognitive performance in acute phase psychosis
E Johnsen, F Fathian, RA Kroken, VM Steen, HA Jørgensen, R Gjestad, ...
BMC psychiatry 16, 1-11, 2016
782016
Auditory verbal hallucinations in schizophrenia as aberrant lateralized speech perception: evidence from dichotic listening
K Hugdahl, EM Løberg, LE Falkenberg, E Johnsen, K Kompus, ...
Schizophrenia research 140 (1-3), 59-64, 2012
772012
Effectiveness of second-generation antipsychotics: a naturalistic, randomized comparison of olanzapine, quetiapine, risperidone, and ziprasidone
E Johnsen, RA Kroken, T Wentzel-Larsen, HA Jørgensen
BMC psychiatry 10, 1-13, 2010
742010
Glutamate as a mediating transmitter for auditory hallucinations in schizophrenia: A 1H MRS study
K Hugdahl, AR Craven, M Nygård, EM Løberg, JØ Berle, E Johnsen, ...
Schizophrenia research 161 (2-3), 252-260, 2015
702015
Efficacy of different types of cognitive enhancers for patients with schizophrenia: a meta-analysis
I Sinkeviciute, M Begemann, M Prikken, B Oranje, E Johnsen, WU Lei, ...
NPJ schizophrenia 4 (1), 22, 2018
672018
Antipsychotic-induced hyperprolactinemia: a cross-sectional survey
E Johnsen, RA Kroken, M Abaza, H Olberg, HA Jørgensen
Journal of clinical psychopharmacology 28 (6), 686-690, 2008
652008
Impact of glutamate levels on neuronal response and cognitive abilities in schizophrenia
LE Falkenberg, R Westerhausen, AR Craven, E Johnsen, RA Kroken, ...
NeuroImage: Clinical 4, 576-584, 2014
642014
The role of the primary auditory cortex in the neural mechanism of auditory verbal hallucinations
K Kompus, LE Falkenberg, JJ Bless, E Johnsen, RA Kroken, B Kråkvik, ...
Frontiers in Human Neuroscience 7, 144, 2013
592013
A critical review of pro-cognitive drug targets in psychosis: convergence on myelination and inflammation
RA Kroken, EM Løberg, T Drønen, R Grüner, K Hugdahl, K Kompus, ...
Frontiers in psychiatry 5, 11, 2014
572014
Failure of attention focus and cognitive control in schizophrenia patients with auditory verbal hallucinations: evidence from dichotic listening
K Hugdahl, M Nygård, LE Falkenberg, K Kompus, R Westerhausen, ...
Schizophrenia Research 147 (2-3), 301-309, 2013
572013
Trends in utilization and dosing of antipsychotic drugs in Scandinavia: comparison of 2006 and 2016
M Højlund, A Pottegård, E Johnsen, RA Kroken, J Reutfors, ...
British journal of clinical pharmacology 85 (7), 1598-1606, 2019
512019
Patients with schizophrenia fail to up-regulate task-positive and down-regulate task-negative brain networks: an fMRI study using an ICA analysis approach
M Nygård, T Eichele, EM Løberg, HA Jørgensen, E Johnsen, RA Kroken, ...
Frontiers in Human Neuroscience 6, 149, 2012
482012
Anti-depressive effectiveness of olanzapine, quetiapine, risperidone and ziprasidone: a pragmatic, randomized trial
E Kjelby, HA Jørgensen, RA Kroken, EM Løberg, E Johnsen
BMC psychiatry 11, 1-10, 2011
482011
Amisulpride, aripiprazole, and olanzapine in patients with schizophrenia-spectrum disorders (BeSt InTro): a pragmatic, rater-blind, semi-randomised trial
E Johnsen, RA Kroken, EM Løberg, M Rettenbacher, I Joa, TK Larsen, ...
The Lancet Psychiatry 7 (11), 945-954, 2020
462020
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