- Correspondence to Dr Jonas F Ludvigsson, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm 17177, Sweden; Dr Steffen Husby, Hans Christian Andersen Children's Hospital, Odense University Hospital, DK-5000 Odense, Denmark;
- Received February 1, 2016
- Revised March 23, 2016
- Accepted March 27, 2016
- First published April 18, 2016.
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