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Paper published by Dr Vera Ehrenstein:
Original Research
Validity of asthma diagnoses in the Danish National Registry of Patients, including an assessment of impact of misclassification on risk estimates in an actual dataset
Annette Østergaard Jensen, Gunnar Lauge Nielsen, Vera Ehrenstein
Clinical Epidemiology 2010, 2:67-72
Published Date: 22 April 2010