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Clinical Chemistry|August 19, 2006
Postanalytical external quality assessment of warfarin monitoring in primary healthcareAnn-Helen Kristoffersen, Geir Thue, Sverre Sandberg
Annals of Clinical Biochemistry|September 13, 2012
A model for calculating the within-subject biological variation and likelihood ratios for analytes with a time-dependent change in concentrations; exemplified with the use of D-dimer in suspected venous thromboembolism in healthy pregnant womenAnn-Helen Kristoffersen, Per H Petersen, Sverre Sandberg
Clinical Chemistry and Laboratory Medicine|April 13, 2018
Within-subject biological variation of activated partial thromboplastin time, prothrombin time, fibrinogen, factor VIII and von Willebrand factor in pregnant womenAnn Helen Kristoffersen, Per Hyltoft Petersen, Line Bjørge, et al.
Biochemia Medica|March 15, 2014
How to conduct External Quality Assessment Schemes for the pre-analytical phase?Gunn B B Kristensen, Kristin Moberg Aakre, Ann Helen Kristoffersen, et al.
European Journal of Human Genetics : EJHG|March 25, 2010
Usefulness of factor V Leiden mutation testing in clinical practiceEllen Ø Blinkenberg, Ann-Helen Kristoffersen, Sverre Sandberg, et al.
International Journal of Laboratory Hematology|September 25, 2019
Impact of different preanalytical conditions on results of lupus anticoagulant testsAnn Helen Kristoffersen, Ida Jansrud Hammer, Solveig Vannes, et al.
Scandinavian Journal of Primary Health Care|August 5, 2017
Warfarin monitoring in nursing homes assessed by case histories. Do recommendations and electronic alerts affect judgements?Reyes Serrano Teruel, Geir Thue, Svein Ivar Fylkesnes, et al.
Thrombosis and Haemostasis|August 2, 2019
Quality of Warfarin Therapy and Quality of Life are Improved by Self-Management for Two YearsUna Ørvim Sølvik, Elisabeth Løkkebø, Ann Helen Kristoffersen, et al.
Clinica Chimica Acta; International Journal of Clinical Chemistry|August 30, 2022
An international study on activated partial thromboplastin time prolongation. Part 1: Analytical resultsJosep Miquel Bauça, Éva Ajzner, Janne Cadamuro, et al.
Clinica Chimica Acta; International Journal of Clinical Chemistry|September 2, 2022
An international study on activated partial thromboplastin time prolongation. Part 2: Interpretative commentingJosep Miquel Bauça, Éva Ajzner, Janne Cadamuro, et al.
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