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Feedback in Couple and Family Therapy: A Randomized Clinical Trial.

Tilden T, Wampold BE, Ulvenes P, Zahl-Olsen R, Hoffart A, Barstad B, Olsen IA, Gude T, Pinsof WM, Zinbarg RE, Nilssen HH, Håland ÅT.

Fam Process. 2019 Sep 9. doi: 10.1111/famp.12485. [Epub ahead of print]


Porphyromonas gingivalis and its CRISPR-Cas system.

Chen T, Olsen I.

J Oral Microbiol. 2019 Jul 3;11(1):1638196. doi: 10.1080/20002297.2019.1638196. eCollection 2019. Review.


Zhang's guidelines vs WHO guidelines for diagnosing labour dystocia - Authors' reply.

Bernitz S, Dalbye R, Olsen IC, Blix E, Øian P, Eggebø TM.

Lancet. 2019 Aug 17;394(10198):e11. doi: 10.1016/S0140-6736(19)31110-9. Epub 2019 Jun 25. No abstract available.


Comment on: Assessments of the unmet need in the management of patients with rheumatoid arthritis: analyses from the NOR-DMARD registry: reply.

Olsen IC.

Rheumatology (Oxford). 2019 Oct 1;58(10):1885-1886. doi: 10.1093/rheumatology/kez211. No abstract available.


The Labor Progression Study: The use of oxytocin augmentation during labor following Zhang's guideline and the WHO partograph in a cluster randomized trial.

Dalbye R, Bernitz S, Olsen IC, Zhang J, Eggebø TM, Rozsa D, Frøslie KF, Øian P, Blix E.

Acta Obstet Gynecol Scand. 2019 Sep;98(9):1187-1194. doi: 10.1111/aogs.13629. Epub 2019 Jun 14.


Can oral bacteria affect the microbiome of the gut?

Olsen I, Yamazaki K.

J Oral Microbiol. 2019 Mar 18;11(1):1586422. doi: 10.1080/20002297.2019.1586422. eCollection 2019.


Long-term efficacy and safety of biosimilar infliximab (CT-P13) after switching from originator infliximab: open-label extension of the NOR-SWITCH trial.

Goll GL, Jørgensen KK, Sexton J, Olsen IC, Bolstad N, Haavardsholm EA, Lundin KEA, Tveit KS, Lorentzen M, Berset IP, Fevang BTS, Kalstad S, Ryggen K, Warren DJ, Klaasen RA, Asak Ø, Baigh S, Blomgren IM, Brenna Ø, Bruun TJ, Dvergsnes K, Frigstad SO, Hansen IM, Hatten ISH, Huppertz-Hauss G, Henriksen M, Hoie SS, Krogh J, Midtgard IP, Mielnik P, Moum B, Noraberg G, Poyan A, Prestegård U, Rashid HU, Strand EK, Skjetne K, Seeberg KA, Torp R, Ystrøm CM, Vold C, Zettel CC, Waksvik K, Gulbrandsen B, Hagfors J, Mørk C, Jahnsen J, Kvien TK.

J Intern Med. 2019 Jun;285(6):653-669. doi: 10.1111/joim.12880. Epub 2019 Apr 12.


Assessing the role of Porphyromonas gingivalis in periodontitis to determine a causative relationship with Alzheimer's disease.

Singhrao SK, Olsen I.

J Oral Microbiol. 2019 Jan 29;11(1):1563405. doi: 10.1080/20002297.2018.1563405. eCollection 2019. Review.


Possible role of Porphyromonas gingivalis in orodigestive cancers.

Olsen I, Yilmaz Ö.

J Oral Microbiol. 2019 Jan 9;11(1):1563410. doi: 10.1080/20002297.2018.1563410. eCollection 2019. Review.


Are Porphyromonas gingivalis Outer Membrane Vesicles Microbullets for Sporadic Alzheimer's Disease Manifestation?

Singhrao SK, Olsen I.

J Alzheimers Dis Rep. 2018 Dec 20;2(1):219-228. doi: 10.3233/ADR-180080.


The frequency of intrapartum caesarean section use with the WHO partograph versus Zhang's guideline in the Labour Progression Study (LaPS): a multicentre, cluster-randomised controlled trial.

Bernitz S, Dalbye R, Zhang J, Eggebø TM, Frøslie KF, Olsen IC, Blix E, Øian P.

Lancet. 2019 Jan 26;393(10169):340-348. doi: 10.1016/S0140-6736(18)31991-3. Epub 2018 Dec 20.


Comparing the disease course of patients with seronegative and seropositive rheumatoid arthritis fulfilling the 2010 ACR/EULAR classification criteria in a treat-to-target setting: 2-year data from the ARCTIC trial.

Nordberg LB, Lillegraven S, Aga AB, Sexton J, Olsen IC, Lie E, Berner Hammer H, Uhlig T, van der Heijde D, Kvien TK, Haavardsholm EA.

RMD Open. 2018 Nov 16;4(2):e000752. doi: 10.1136/rmdopen-2018-000752. eCollection 2018.


Assessments of the unmet need in the management of patients with rheumatoid arthritis: analyses from the NOR-DMARD registry.

Olsen IC, Lie E, Vasilescu R, Wallenstein G, Strengholt S, Kvien TK.

Rheumatology (Oxford). 2019 Mar 1;58(3):481-491. doi: 10.1093/rheumatology/key338.


Expression of growth mediators in the gingival crevicular fluid of patients with aggressive periodontitis undergoing periodontal surgery.

Rakmanee T, Calciolari E, Olsen I, Darbar U, Griffiths GS, Petrie A, Donos N.

Clin Oral Investig. 2019 Aug;23(8):3307-3318. doi: 10.1007/s00784-018-2752-z. Epub 2018 Nov 29.


Predicting achievement of the treatment targets at 6 months from 3-month response levels in rheumatoid arthritis: data from real-life follow-up in the NOR-DMARD study.

Norvang V, Sexton J, Kristianslund EK, Olsen IC, Uhlig T, Bakland G, Krøll F, Rødevand E, Wierød A, Kvien TK, Smolen JS, Aletaha D, Haavardsholm EA.

RMD Open. 2018 Oct 26;4(2):e000773. doi: 10.1136/rmdopen-2018-000773. eCollection 2018.


Feasibility of cardiovascular disease risk assessments in rheumatology outpatient clinics: experiences from the nationwide NOCAR project.

Ikdahl E, Rollefstad S, Wibetoe G, Salberg A, Krøll F, Bergsmark K, Kvien TK, Olsen IC, Soldal DM, Bakland G, Lexberg Å, Gjesdal CG, Gulseth C, Haugeberg G, Semb AG.

RMD Open. 2018 Oct 1;4(2):e000737. doi: 10.1136/rmdopen-2018-000737. eCollection 2018.


Periodontal Pathogens and Associated Intrathecal Antibodies in Early Stages of Alzheimer's Disease.

Laugisch O, Johnen A, Maldonado A, Ehmke B, Bürgin W, Olsen I, Potempa J, Sculean A, Duning T, Eick S.

J Alzheimers Dis. 2018;66(1):105-114. doi: 10.3233/JAD-180620.


Longitudinal BMI Growth Curves for Surviving Preterm NICU Infants Based on a Large US Sample.

Williamson AL, Derado J, Barney BJ, Saunders G, Olsen IE, Clark RH, Lawson ML.

Pediatrics. 2018 Sep;142(3). pii: e20174169. doi: 10.1542/peds.2017-4169.


Predictors of sustained remission in patients with early rheumatoid arthritis treated according to an aggressive treat-to-target protocol.

Paulshus Sundlisæter N, Olsen IC, Aga AB, Hammer HB, Uhlig T, van der Heijde D, Kvien TK, Lillegraven S, Haavardsholm EA; ARCTIC study group.

Rheumatology (Oxford). 2018 Nov 1;57(11):2022-2031. doi: 10.1093/rheumatology/key202.


Guideline recommended treatment to targets of cardiovascular risk is inadequate in patients with inflammatory joint diseases.

Ikdahl E, Wibetoe G, Rollefstad S, Salberg A, Bergsmark K, Kvien TK, Olsen IC, Soldal DM, Bakland G, Lexberg Å, Fevang BTS, Gulseth HC, Haugeberg G, Semb AG.

Int J Cardiol. 2019 Jan 1;274:311-318. doi: 10.1016/j.ijcard.2018.06.111. Epub 2018 Jul 2.


Citrullination as a plausible link to periodontitis, rheumatoid arthritis, atherosclerosis and Alzheimer's disease.

Olsen I, Singhrao SK, Potempa J.

J Oral Microbiol. 2018 Jun 22;10(1):1487742. doi: 10.1080/20002297.2018.1487742. eCollection 2018. Review.


Clinical and ultrasound remission after 6 months of treat-to-target therapy in early rheumatoid arthritis: associations to future good radiographic and physical outcomes.

Paulshus Sundlisæter N, Aga AB, Olsen IC, Hammer HB, Uhlig T, van der Heijde D, Kvien TK, Lillegraven S, Haavardsholm EA; ARCTIC study group.

Ann Rheum Dis. 2018 Oct;77(10):1421-1425. doi: 10.1136/annrheumdis-2017-212830. Epub 2018 Jun 22.


Ibuprofen versus pivmecillinam for uncomplicated urinary tract infection in women-A double-blind, randomized non-inferiority trial.

Vik I, Bollestad M, Grude N, Bærheim A, Damsgaard E, Neumark T, Bjerrum L, Cordoba G, Olsen IC, Lindbæk M.

PLoS Med. 2018 May 15;15(5):e1002569. doi: 10.1371/journal.pmed.1002569. eCollection 2018 May.


Genetic exchange and reassignment in Porphyromonas gingivalis.

Olsen I, Chen T, Tribble GD.

J Oral Microbiol. 2018 Apr 12;10(1):1457373. doi: 10.1080/20002297.2018.1457373. eCollection 2018. Review.


Relationship between serine dipeptide lipids of commensal Bacteroidetes and atherosclerosis.

Olsen I.

J Oral Microbiol. 2018 Mar 22;10(1):1453224. doi: 10.1080/20002297.2018.1453224. eCollection 2018. No abstract available.


Are Sphingolipids and Serine Dipeptide Lipids Underestimated Virulence Factors of Porphyromonas gingivalis?

Olsen I, Nichols FC.

Infect Immun. 2018 Jun 21;86(7). pii: e00035-18. doi: 10.1128/IAI.00035-18. Print 2018 Jul. Review.


The Impact of Ultrasound on the Use and Efficacy of Intraarticular Glucocorticoid Injections in Early Rheumatoid Arthritis: Secondary Analyses From a Randomized Trial Examining the Benefit of Ultrasound in a Clinical Tight Control Regimen.

Nordberg LB, Lillegraven S, Aga AB, Sexton J, Lie E, Hammer HB, Olsen IC, Uhlig T, van der Heijde D, Kvien TK, Haavardsholm EA.

Arthritis Rheumatol. 2018 Aug;70(8):1192-1199. doi: 10.1002/art.40494. Epub 2018 Jun 29.


Oral microbiota in autoimmune polyendocrine syndrome type 1.

Bruserud Ø, Siddiqui H, Marthinussen MC, Chen T, Jonsson R, Oftedal BE, Olsen I, Husebye ES, Wolff AB.

J Oral Microbiol. 2018 Feb 26;10(1):1442986. doi: 10.1080/20002297.2018.1442986. eCollection 2018.


Importance of heterogeneity in Porhyromonas gingivalis lipopolysaccharide lipid A in tissue specific inflammatory signalling.

Olsen I, Singhrao SK.

J Oral Microbiol. 2018 Feb 26;10(1):1440128. doi: 10.1080/20002297.2018.1440128. eCollection 2018. Review.


Organization of supragingival plaque at the micron scale.

Olsen I.

J Oral Microbiol. 2018 Feb 15;10(1):1438722. doi: 10.1080/20002297.2018.1438722. eCollection 2018. No abstract available.


Reply to the Letter to the Editor "Accurate Direct Measures Are Required to Validate Derived Measures".

Clark RH, Olsen IE, Ferguson AN, Lawson ML.

Neonatology. 2018;113(3):267-268. doi: 10.1159/000486230. Epub 2018 Jan 31. No abstract available.


Discrepancies in risk age and relative risk estimations of cardiovascular disease in patients with inflammatory joint diseases.

Wibetoe G, Ikdahl E, Rollefstad S, Olsen IC, Bergsmark K, Kvien TK, Salberg A, Soldal DM, Bakland G, Lexberg Å, Fevang BT, Gulseth HC, Haugeberg G, Semb AG.

Int J Cardiol. 2018 Feb 1;252:201-206. doi: 10.1016/j.ijcard.2017.10.038.


Efficacy of infliximab biosimilars in patients with Crohn's disease - Authors' reply.

Jørgensen KK, Lundin KE, Olsen IC, Kvien TK, Jahnsen J.

Lancet. 2017 Dec 2;390(10111):2436. doi: 10.1016/S0140-6736(17)32463-7. Epub 2017 Dec 1. No abstract available.


BMI Is a Better Body Proportionality Measure than the Ponderal Index and Weight-for-Length for Preterm Infants.

Ferguson AN, Grabich SC, Olsen IE, Cantrell R, Clark RH, Ballew WN, Chou J, Lawson ML.

Neonatology. 2018;113(2):108-116. doi: 10.1159/000480118. Epub 2017 Nov 9.


Periodontitis, Microbiomes and their Role in Alzheimer's Disease.

Pritchard AB, Crean S, Olsen I, Singhrao SK.

Front Aging Neurosci. 2017 Oct 24;9:336. doi: 10.3389/fnagi.2017.00336. eCollection 2017.


Oral microbial dysbiosis precedes development of pancreatic cancer.

Olsen I.

J Oral Microbiol. 2017 Sep 18;9(1):1374148. doi: 10.1080/20002297.2017.1374148. eCollection 2017. No abstract available.


Leptotrichia species in human infections II.

Eribe ERK, Olsen I.

J Oral Microbiol. 2017 Sep 15;9(1):1368848. doi: 10.1080/20002297.2017.1368848. eCollection 2017. Review.


Calprotectin as a marker of inflammation in patients with early rheumatoid arthritis.

Jonsson MK, Sundlisæter NP, Nordal HH, Hammer HB, Aga AB, Olsen IC, Brokstad KA, van der Heijde D, Kvien TK, Fevang BS, Lillegraven S, Haavardsholm EA.

Ann Rheum Dis. 2017 Dec;76(12):2031-2037. doi: 10.1136/annrheumdis-2017-211695. Epub 2017 Aug 16.


Porphyromonas gingivalis disturbs host-commensal homeostasis by changing complement function.

Olsen I, Lambris JD, Hajishengallis G.

J Oral Microbiol. 2017 Jun 30;9(1):1340085. doi: 10.1080/20002297.2017.1340085. eCollection 2017. Review.


Periodontitis, pathogenesis and progression: miRNA-mediated cellular responses to Porphyromonas gingivalis.

Olsen I, Singhrao SK, Osmundsen H.

J Oral Microbiol. 2017 Jun 12;9(1):1333396. doi: 10.1080/20002297.2017.1333396. eCollection 2017.


Comorbidity of periodontal disease: two sides of the same coin? An introduction for the clinician.

Holmstrup P, Damgaard C, Olsen I, Klinge B, Flyvbjerg A, Nielsen CH, Hansen PR.

J Oral Microbiol. 2017 Jun 14;9(1):1332710. doi: 10.1080/20002297.2017.1332710. eCollection 2017. Review.


Cardiovascular disease risk profiles in inflammatory joint disease entities.

Wibetoe G, Ikdahl E, Rollefstad S, Olsen IC, Bergsmark K, Kvien TK, Salberg A, Soldal DM, Bakland G, Lexberg Å, Fevang BT, Gulseth HC, Haugeberg G, Semb AG.

Arthritis Res Ther. 2017 Jul 3;19(1):153. doi: 10.1186/s13075-017-1358-1.


Global health and its changing landscape.

Winkler AS, Olsen IT, Gradmann C.

Tidsskr Nor Laegeforen. 2017 Jun 26;137(12-13):853. doi: 10.4045/tidsskr.17.0489. Print 2017 Jun 27. Norwegian. No abstract available.


Switching from originator infliximab to biosimilar CT-P13 compared with maintained treatment with originator infliximab (NOR-SWITCH): a 52-week, randomised, double-blind, non-inferiority trial.

Jørgensen KK, Olsen IC, Goll GL, Lorentzen M, Bolstad N, Haavardsholm EA, Lundin KEA, Mørk C, Jahnsen J, Kvien TK; NOR-SWITCH study group.

Lancet. 2017 Jun 10;389(10086):2304-2316. doi: 10.1016/S0140-6736(17)30068-5. Epub 2017 May 11. Erratum in: Lancet. 2017 Jun 10;389(10086):2286.


[Solidarity and sobriety in medical priorities in Northern Norway].

Wisborg T, Olsen IP, Kvalsvik O, Jenssen KT.

Tidsskr Nor Laegeforen. 2017 Mar 21;137(6):428. doi: 10.4045/tidsskr.17.0112. eCollection 2017 Mar. Norwegian. No abstract available.


In silico Comparison of 19 Porphyromonas gingivalis Strains in Genomics, Phylogenetics, Phylogenomics and Functional Genomics.

Chen T, Siddiqui H, Olsen I.

Front Cell Infect Microbiol. 2017 Feb 14;7:28. doi: 10.3389/fcimb.2017.00028. eCollection 2017.


Tumour necrosis factor inhibitor treatment and occurrence of anterior uveitis in ankylosing spondylitis: results from the Swedish biologics register.

Lie E, Lindström U, Zverkova-Sandström T, Olsen IC, Forsblad-d'Elia H, Askling J, Kapetanovic MC, Kristensen LE, Jacobsson LTH.

Ann Rheum Dis. 2017 Sep;76(9):1515-1521. doi: 10.1136/annrheumdis-2016-210931. Epub 2017 Mar 2.


4β-Hydroxycholesterol Level in Patients With Rheumatoid Arthritis Before vs. After Initiation of bDMARDs and Correlation With Inflammatory State.

Wollmann BM, Syversen SW, Lie E, Gjestad C, Mehus LL, Olsen IC, Molden E.

Clin Transl Sci. 2017 Jan;10(1):42-49. doi: 10.1111/cts.12431. Epub 2016 Nov 5.


Do We Need Another Set of Growth Charts for Premature Infants?

Clark RH, Olsen IE.

Pediatrics. 2016 Dec;138(6). pii: e20163128. Epub 2016 Nov 18. No abstract available.

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