Received: 17 July 2017
Accepted: 4 January 2018
First Online: 25 January 2018
Ethics approval and consent to participate
: The study was approved by the Swedish National Board of Health and Welfare (Socialstyrelsen 26.11.2013) and by the Ethics Committee in Stockholm (diary number 2013/1412-31/2). The social security numbers of identified patients were replaced with study identification numbers at the Swedish National Board of Health and Welfare prior to data processing. No informed consent was required for this study.
: Not applicable.
: AE, and JMK are employed at Takeda A/S, the sponsor of this study. At time of study TB was employed at Takeda A/S, but presently is employed by GSK. VM, JW, and FH are employees of EPID Research. EPID Research is a contract research organization that performs commissioned pharmacoepidemiological studies and thus their employees have been and currently are working in collaboration with several pharmaceutical companies (including Takeda A/S); GJ has worked as a consultant on this study.
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