- Correspondence to Dr Mauro D'Amato, Unit of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Eugeniahemmet T2, Karolinska University Hospital, Solna 17176, Stockholm, Sweden;
- Received June 16, 2016
- Revised October 29, 2016
- Accepted October 31, 2016
- First published November 21, 2016.
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