- Correspondence to Dr Hildur Helgadottir, Department of Oncology and Pathology, Karolinska Institutet, Karolinska University Hospital, Solna, Stockholm 171 76, Sweden;
- Received January 28, 2014
- Revised May 7, 2014
- Accepted May 24, 2014
- First published June 16, 2014.
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