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Aamodt AH, Borch-Iohnsen B, Hagen K, Stovner LJ, Asberg A, Zwart JA Headache prevalence related to haemoglobin and ferritin. The HUNT Study 2004 Cephalalgia 2004 24 758-62 details  
Aamodt AH, Stovner LJ, Hagen K, Zwart JA Comorbidity of headache and gastrointestinal complaints. The Head-HUNT Study 2007 Cephalalgia 2007 28 144-51 details  
Asberg, A.N.; Stovner, L.J.; Zwart, J.-A.; Winsvold, B.S.; Heuch, I.; Hagen, K. Migraine as a predictor of mortality: The HUNT study 2015 Cephalalgia : an International Journal of Headache details   doi
Fiane I, Haugland ME, Stovner LJ, Zwart JA, Bovim G, Hagen K Sick leave is related to frequencies of migraine and non-migrainous headache – The HUNT Study 2006 Cephalalgia 2006 26 960-7 details  
Hagen K, Stovner LJ, Zwart JA Potentials and pitfalls in analytical headache epidemiological studies – lessons to be learned from the Head-.HUNT study 2007 Cephalalgia 2007 27 403-13 details  
Hagen K, Vatten L, Stovner LJ, Zwart JA, Krokstad S, Bovim G Low socio-economic status is associated with increased risk of frequent headache: a prospective study of 22 718 adults in Norway 2002 Cephalalgia 2002 22 672-9 details  
Hagen K, Zwart JA, Vatten L, Stovner LJ, Bovim G Prevalence of migraine and non-migrainous headache – head-HUNT, a large population-based study. 2000 Cephalalgia, 20(10), 900-906. details  
Hagen K, Zwart JA, Vatten L, Stovner LJ, Bovim G Head-HUNT: validity and reliability of a headache questionnaire in a large population-based study in Norway. 2000 Cephalalgia, 2000, 20,244-251. details  
Hagen, K.; Asvold, B.O.; Midthjell, K.; Stovner, L.J.; Zwart, J.-A.; Linde, M. Inverse relationship between type 1 diabetes mellitus and migraine. Data from the Nord-Trondelag Health Surveys 1995-1997 and 2006-2008 2018 Cephalalgia : an International Journal of Headache 38 417-426 details   doi
Hagen, K.; Stordal, E.; Linde, M.; Steiner, T.J.; Zwart, J.-A.; Stovner, L.J. Headache as a risk factor for dementia: a prospective population-based study 2014 Cephalalgia : an International Journal of Headache 34 327-335 details   doi
Hagen, K.; Stordal, E.; Linde, M.; Steiner, T.J.; Zwart, J.-A.; Stovner, L.J. Headache as a risk factor for dementia: A prospective population-based study 2013 Cephalalgia : an International Journal of Headache details   doi
Hagen, K.; Wisloff, U.; Ellingsen, O.; Stovner, L.J.; Linde, M. Headache and peak oxygen uptake: The HUNT3 study 2016 Cephalalgia 36 437-444 details  
Hansen, A.G.; Stovner, L.J.; Hagen, K.; Helvik, A.-S.; Thorstensen, W.M.; Nordgard, S.; Bugten, V.; Eggesbo, H.B. Paranasal sinus opacification in headache sufferers: A population-based imaging study (the HUNT study-MRI) 2017 Cephalalgia : an International Journal of Headache 37 509-516 details   doi
Hoem Nordhaug, L.; Vik, A.; Hagen, K.; Stovner, L.J.; Pedersen, T.; Gravdahl, G.B.; Linde, M. Headaches in patients with previous head injuries: A population-based historical cohort study (HUNT) 2015 Cephalalgia details   doi
Honningsvag, L.-M.; Haberg, A.K.; Hagen, K.; Kvistad, K.A.; Stovner, L.J.; Linde, M. White matter hyperintensities and headache: A population-based imaging study (HUNT MRI) 2018 Cephalalgia : an International Journal of Headache 38 1927-1939 details   doi
Honningsvag, L.-M.; Hagen, K.; Haberg, A.; Stovner, L.J.; Linde, M. Intracranial abnormalities and headache: A population-based imaging study (HUNT MRI) 2015 Cephalalgia : an International Journal of Headache details   doi
Honningsvag, L.M.; Hagen, K.; Haberg, A.; Stovner, L.J.; Linde, M. Intracranial abnormalities and headache: A population-based imaging study (HUNT MRI) 2016 Cephalalgia 36 113-121 details   doi
Husoy, A.K.; Indergaard, M.K.; Honningsvag, L.-M.; Haberg, A.K.; Hagen, K.; Linde, M.; Garseth, M.; Stovner, L.J. Perivascular spaces and headache: A population-based imaging study (HUNT-MRI) 2015 Cephalalgia : an International Journal of Headache details   doi
Husoy, A.K.; Indergaard, M.K.; Honningsvag, L.M.; Haberg, A.K.; Hagen, K.; Linde, M.; Garseth, M.; Stovner, L.J. Perivascular spaces and headache: A population-based imaging study (HUNT-MRI) 2016 Cephalalgia 36 232-239 details   doi
Husoy, A.K.; Pintzka, C.; Eikenes, L.; Haberg, A.K.; Hagen, K.; Linde, M.; Stovner, L.J. Volume and shape of subcortical grey matter structures related to headache: A cross-sectional population-based imaging study in the Nord-Trondelag Health Study 2018 Cephalalgia : an International Journal of Headache 333102418780632 details   doi
Larsen, J.S.; Skaug, E.A.; Wisloff, U.; Ellingsen, O.; Stovner, L.J.; Linde, M.; Hagen, K. Migraine and endothelial function: The HUNT3 Study 2016 Cephalalgia details   doi
Linde M, Stovner LJ, Zwart JA, Hagen K Time trends in the prevalence of headache disorders. The Nord-Trøndelag Health Studies (HUNT 2 and HUNT 3) 2011 Cephalalgia 2011 31 585-96 details  
Linde M, Stovner LJ, Zwart JA, Hagen K Time trends in the prevalence of headache disorders. The Nord-Trøndelag Health Studies (HUNT 2 and HUNT 3) 2010 Cephalalgia. 2010 Dec 2. [Epub ahead of print] details  
Oedegaard KJ, Neckelmann D, Mykletun A, Dahl AA, Zwart JA, Hagen K, Fasmer OB Migraine with and without aura: association with depression and anxiety disorder in a population-based study. The HUNT Study 2006 Cephalalgia 2005 26 1-6 details  
Sand T, Hagen K, Schrader Sleep apnoea and chronic headache 2003 Cephalalgia 2003 23 90-5 details  
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