Jan Olav Johannessen

Reducing the Duration of Untreated First-Episode Psychosis

Ingrid Melle, Tor Ketil Larsen, Ulrik Haahr et al. · Archives of General Psychiatry · 2004 · 439 citations

Early detection strategies for untreated first-episode psychosis

Jan Olav Johannessen, Thomas H. McGlashan, Tor Ketil Larsen et al. · Schizophrenia Research · 2001 · 253 citations

Psychiatry, Psychotic Disorder, Diagnosis +7

The Key to Reducing Duration of Untreated First Psychosis: Information Campaigns

Inge Joa, Jan Olav Johannessen, B. Auestad et al. · Schizophrenia Bulletin · 2007 · 200 citations · Full text

Premorbid functioning versus duration of untreated psychosis in 1 year outcome in first-episode psychosis

Tor Ketil Larsen, Lars C. Moe, Lars Vibe-Hansen et al. · Schizophrenia Research · 2000 · 197 citations

Psychiatry, Psychotic Disorder, Clinical Psychology +12

Shortened Duration of Untreated First Episode of Psychosis: Changes in Patient Characteristics at Treatment

Tor Ketil Larsen, Thomas H. McGlashan, Jan Olav Johannessen et al. · American Journal of Psychiatry · 2001 · 170 citations