- Correspondence to Professor Nathalie Costedoat-Chalumeau, AP-HP, Service de Médecine Interne, Faculté Paris 6, Hôpital Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, Paris 75013, France;
- Accepted October 7, 2012
- First published November 10, 2012.
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