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Browsing by Author "Halldórsson, Gísli Hreinn"

Browsing by Author "Halldórsson, Gísli Hreinn"

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    Effect of booster vaccination against Delta and Omicron SARS-CoV-2 variants in Iceland 
    Norddahl, Gudmundur L.; Melsted, Páll; Gunnarsdottir, Kristbjorg; Halldórsson, Gísli Hreinn; Olafsdottir, Thorunn; Gylfason, Arnaldur; Kristjánsson, Már; Magnusson, Olafur T.; sulem, patrick; Gudbjartsson, Daniel Fannar; Þorsteinsdóttir, Unnur; Jónsdóttir, Ingileif; Stefánsson, Kári (2022-09-28)
    By the end of July 2021, the majority of the Icelandic population had received vaccination against COVID-19. In mid-July a wave of SARS-CoV-2 infections, dominated by the Delta variant, spread through the population, followed by an Omicron wave in ...
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    Genetic architecture of band neutrophil fraction in Iceland 
    Oskarsson, Gudjon R.; Magnússon, Magnús Karl; Oddson, Ásmundur; Jensson, Brynjar O; Friðriksdóttir, Rún; Arnadottir, Gudny A; Katrinardottir, Hildigunnur; Rögnvaldsson, Sölvi; Halldórsson, Gísli Hreinn; Sveinbjörnsson, Gardar; Ivarsdottir, Erna V.; Stefánsdóttir, Lilja; Ferkingstad, Egil; Norland, Kristjan; Tragante, Vinicius; Sæmundsdóttir, Jóna; Jónasdóttir, Áslaug; Jonasdottir, Adalbjorg; Sigurjonsdottir, Svanhvit; Petursdottir, Karen O.; Davidsson, Olafur B; Rafnar, Thorunn; Hólm, Hilma; Ólafsson, Ísleifur; Önundarson, Páll Torfi; Viðarsson, Brynjar; Sigurdardottir, Olof G.; Másson, Gísli; Gudbjartsson, Daniel Fannar; Jónsdóttir, Ingileif; Norddahl, Gudmundur L.; Þorsteinsdóttir, Unnur; Sulem, Patrick; Stefánsson, Kári (2022-06-01)
    The characteristic lobulated nuclear morphology of granulocytes is partially determined by composition of nuclear envelope proteins. Abnormal nuclear morphology is primarily observed as an increased number of hypolobulated immature neutrophils, called ...
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    Genetics and epidemiology of mutational barcode-defined clonal hematopoiesis 
    Stacey, Simon N.; Zink, Florian; Halldórsson, Gísli Hreinn; Stefánsdóttir, Lilja; Guðjónsson, Sigurjón Axel; Einarsson, Gudmundur; Hjörleifsson, Grimur; Eiríksdóttir, Þjóðbjörg; Helgadottir, Anna; Björnsdottir, Gyda; Thorgeirsson, Thorgeir E.; Ólafsdóttir, Þórunn Ásta; Jónsdóttir, Ingileif; Gretarsdottir, Solveig; Tragante, Vinicius; Magnússon, Magnús Karl; Jonsson, Hakon; Gudmundsson, Julius; Olafsson, Sigurgeir; Holm, Hilma; Gudbjartsson, Daniel F.; Sulem, Patrick; Helgason, Agnar Sturla; Þorsteinsdóttir, Unnur; Tryggvadottir, Laufey; Rafnar, Thorunn; Melsted, Páll; Úlfarsson, Magnús Örn; Viðarsson, Brynjar; Thorleifsson, Gudmar; Stefánsson, Kári (2023-11-06)
    Clonal hematopoiesis (CH) arises when a substantial proportion of mature blood cells is derived from a single hematopoietic stem cell lineage. Using whole-genome sequencing of 45,510 Icelandic and 130,709 UK Biobank participants combined with a mutational ...
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    HLA alleles, disease severity, and age associate with T-cell responses following infection with SARS-CoV-2 
    Olafsdottir, Thorunn A; Bjarnadottir, Kristbjorg; Norddahl, Gudmundur L.; Halldórsson, Gísli Hreinn; Melsted, Páll; Gunnarsdottir, Kristbjorg; Ivarsdottir, Erna; Olafsdottir, Thorhildur; Arnthorsson, Asgeir O; Theódórs, Fannar; Eyþórsson, Elías Sæbjörn; Helgason, Dadi; Eggertsson, Hannes P.; Masson, Gisli; Bjarnadottir, Solveig; Sævarsdóttir, Sædís; Runólfsdóttir, Hrafnhildur L.; Ólafsson, Ísleifur; Saemundsdottir, Jona; Sigurðsson, Martin Ingi; Ingvarsson, Ragnar Freyr; Pálsson, Runólfur; Thorgeirsson, Gudmundur; Halldórsson, Bjarni Vilhjálmur; Holm, Hilma; Kristjánsson, Már; Sulem, Patrick; Þorsteinsdóttir, Unnur; Jónsdóttir, Ingileif; Gudbjartsson, Daniel F; Stefansson, Kari (2022-09-06)
    Memory T-cell responses following SARS-CoV-2 infection have been extensively investigated but many studies have been small with a limited range of disease severity. Here we analyze SARS-CoV-2 reactive T-cell responses in 768 convalescent SARS-CoV-2-infected ...
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    Rare variants with large effects provide functional insights into the pathology of migraine subtypes, with and without aura 
    Bjornsdottir, Gyda; Chalmer, Mona A.; Stefánsdóttir, Lilja; Skuladottir, Astros Th; Einarsson, Gudmundur; Andrésdóttir, Margrét; Beyter, Doruk; Ferkingstad, Egil; Gretarsdottir, Solveig; Halldórsson, Bjarni Vilhjálmur; Halldórsson, Gísli Hreinn; Helgadottir, Anna; Helgason, Hannes; Hjorleifsson Eldjarn, Grimur; Jonasdottir, Adalbjorg; Jonasdottir, Aslaug; Jónsdóttir, Ingileif; Knowlton, Kirk U.; Nadauld, Lincoln D.; Lund, Sigrún Helga; Magnusson, Olafur Th; Melsted, Páll; Moore, Kristjan H.S.; Oddsson, Asmundur; Olason, Pall I.; Sigurdsson, Asgeir; Stefansson, Olafur A.; Saemundsdottir, Jona; Sveinbjornsson, Gardar; Tragante, Vinicius; Unnsteinsdottir, Unnur; Walters, Guðmundur Bragi; Zink, Florian; Rødevand, Linn; Andreassen, Ole A.; Igland, Jannicke; Lie, Rolv T.; Haavik, Jan; Banasik, Karina; Brunak, Søren; Didriksen, Maria; T. Bruun, Mie; Erikstrup, Christian; Kogelman, Lisette J.A.; Nielsen, Kaspar R.; Sørensen, Erik; Pedersen, Ole B.; Ullum, Henrik; Bay, Jakob; Boldsen, Jens K.; Brodersen, Thorsten; Burgdorf, Kristoffer; Dinh, Khoa M.; Dowsett, Joseph; Feenstra, Bjarke; Geller, Frank; Hindhede, Lotte; Hjalgrim, Henrik; Jacobsen, Rikke L.; Jemec, Gregor; Kaspersen, Katrine; Kjerulf, Bertram D.; Larsen, Margit A.H.; Louloudis, Ioannis; Lundgaard, Agnete; Mikkelsen, Susan; Mikkelsen, Christina; Nissen, Ioanna; Nyegaard, Mette; Henriksen, Alexander P.; Rohde, Palle D.; Rostgaard, Klaus; Swinn, Michael; Thørner, Lise W.; Bruun, Mie T.; Werge, Thomas; Westergaard, David; Masson, Gisli; Þorsteinsdóttir, Unnur; Olesen, Jes; Ludvigsson, Petur; Thorarensen, Ólafur; Bjornsdottir, Anna; Sigurdardottir, Gudrun R.; Sveinsson, Ólafur Árni; Ostrowski, Sisse R.; Holm, Hilma; Gudbjartsson, Daniel F.; Thorleifsson, Gudmar; Sulem, Patrick; Stefansson, Hreinn; Thorgeirsson, Thorgeir E.; Hansen, Thomas F.; Stefánsson, Kári (2023-11)
    Migraine is a complex neurovascular disease with a range of severity and symptoms, yet mostly studied as one phenotype in genome-wide association studies (GWAS). Here we combine large GWAS datasets from six European populations to study the main migraine ...