- Correspondence to Dr Vladimir Canudas Romo, Max-Planck Odense Center on the Biodemography of Aging, University of Southern Denmark, J.B. Winsloews Vej 9, Odense C 5000, Denmark;
- Received 1 April 2014
- Revised 26 August 2014
- Accepted 7 September 2014
- Published online 24 September 2014.
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