Pedersen, KL, Hallas, J, Hansen, IM J, Ahlquist, P & Ellingsen, T 2018, ' Side-effects and treatment response to methotrexate associated with comorbidity in early rheumatoid arthritis ', European Journal of Hospital Pharmacy-Science and Practice, vol. 25, no. Suppl 1, INT-015, pp. A251-A251 . https://doi.org/10.1136/ejhpharm-2018-eahpconf.540
Altinok, M L, Glintborg, D, Christensen, R D, Hallas, J, Andersen, M & Christensen, R D 2014, ' Prescription of antidepressants is increased in Danish patients with polycystic ovary syndrome and is associated with hyperandrogenism. A population-based cohort study ', Clinical Endocrinology, vol. 80, no. 6, pp. 884-889 . https://doi.org/10.1111/cen.12365
Wettermark, B, Zoëga, H, Furu, K, Korhonen, M, Hallas, J, Nørgaard, M, Almarsdottir, A, Andersen, M, Andersson Sundell, K, Bergman, U M, Helin-Salmivaara, A, Hoffmann, M, Kieler, H, Martikainen, J, Mortensen, M, Petzold, M, Wallach-Kildemoes, H, Wallin, C, Sørensen, H & Almarsdóttir, A B 2013, ' The Nordic prescription databases as a resource for pharmacoepidemiological research : a literature review ', Pharmacoepidemiology and Drug Safety, vol. 22, no. 7, pp. 691-699 . https://doi.org/10.1002/pds.3457
Dall, M, Schaffalitzky de Muckadell, O B, Lassen, A T & Hallas, J 2010, ' There is an association between selective serotonin reuptake inhibitor use and uncomplicated peptic ulcers : a population-based case–control study ', Alimentary Pharmacology and Therapeutics, vol. 32, no. 11-12, pp. 1383-1391 . https://doi.org/10.1111/j.1365-2036.2010.04472.x