[1] Univ Groningen, Univ Med Ctr Groningen, Dept Oral & Maxillofacial Surg, Groningen, Netherlands
[2] Univ Heidelberg, Dept Hematol Oncol & Rheumatol, D-6900 Heidelberg, Germany
[3] Amyloid Ctr, Biotechnol Res Labs, Pavia, Italy
[4] Univ Pavia, Policlin San Matteo, IRCCS, Dept Dermatol, Pavia, Italy
[5] Univ Groningen, Univ Med Ctr Groningen, Dept Rheumatol & Clin Immunol, Groningen, Netherlands