| Lysergic acid diethylamide (LSD) for alcoholism: meta-analysis of randomized controlled trials TS Krebs, PØ Johansen Journal of Psychopharmacology 26 (7), 994-1002, 2012 | 679 | 2012 |
| Psychedelics and mental health: a population study TS Krebs, PØ Johansen PloS one 8 (8), e63972, 2013 | 432 | 2013 |
| Psychedelics not linked to mental health problems or suicidal behavior: A population study PØ Johansen, TS Krebs Journal of psychopharmacology 29 (3), 270-279, 2015 | 375 | 2015 |
| How could MDMA (ecstasy) help anxiety disorders? A neurobiological rationale PØ Johansen, TS Krebs Journal of Psychopharmacology 23 (4), 389-391, 2009 | 148 | 2009 |
| Over 30 million psychedelic users in the United States TS Krebs, PØ Johansen F1000Research 2, 2013 | 143 | 2013 |
| Change in defense mechanisms during short-term dynamic and cognitive therapy in patients with cluster C personality disorders PØ Johansen, TS Krebs, M Svartberg, TC Stiles, A Holen The Journal of nervous and mental disease 199 (9), 712-715, 2011 | 58 | 2011 |
| Development of adaptive coping from mid to late life: a 70-year longitudinal study of defense maturity and its psychosocial correlates JS Martin-Joy, JC Malone, XJ Cui, PØ Johansen, KP Hill, MO Rahman, ... The Journal of nervous and mental disease 205 (9), 685-691, 2017 | 28 | 2017 |
| Importance of psychiatric confounding in non-randomized studies of heavy ecstasy users TS Krebs, PØ Johansen, L Jerome, JH Halpern Psychological medicine 39 (5), 876-878, 2009 | 8 | 2009 |
| Methodological weaknesses in non-randomized studies of ecstasy (MDMA) use: A cautionary note to readers and reviewers TS Krebs, PØ Johansen Neuropsychopharmacology 37 (4), 1070-1071, 2012 | 6 | 2012 |
| No evidence of decrease in cognitive function in users of low-dose Ecstasy TS Krebs, PØ Johansen Archives of general psychiatry 65 (2), 236-236, 2008 | 3 | 2008 |
| Reply letter: Mental health of people who have used classical psychedelics and no other illicit drugs. TS Krebs, PØ Johansen Journal of Psychopharmacology (Oxford, England) 29 (9), 1036-1040, 2015 | 1 | 2015 |
| Unlike nearly all previous research on the issue of potential long-term effects of Ecstasy use, the TS Krebs, PØ Johansen | | 2008 |
| Psychedelics not linked to mental health problems or suicidal behavior PØ Johansen, TS Krebs Journal of Psychopharmacology 1, 10, 0 | | |
