1. European Commission – Joint Research Centre, Directorate F , Retieseweg 111 , 02440-Geel , Belgium , Phone: +32-14-571906
2. European Commission – Joint Research Centre, Directorate F , Geel , Belgium
3. University of Milan , IRCCS Instituto Auxologico Italiano , Milan , Italy
4. St. George’s Hospital, Protein Reference Unit , London , UK