1 Department of Oral and Maxillofacial Surgery, University of Groningen and University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, the Netherlands. Electronic address: h.groenewegen@umcg.nl.
2 Department of Haematology, University of Groningen and University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, the Netherlands. Electronic address: j.f.borjas.howard@umcg.nl.
3 Department of Oral and Maxillofacial Surgery, University of Groningen and University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, the Netherlands. Electronic address: k.delli@umcg.nl.
4 Department of Haematology, University of Groningen and University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, the Netherlands. Electronic address: k.meijer@umcg.nl.
5 Department of Oral and Maxillofacial Surgery, University of Groningen and University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, the Netherlands. Electronic address: a.vissink@umcg.nl.
6 Department of Oral and Maxillofacial Surgery, University of Groningen and University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, the Netherlands. Electronic address: f.k.l.spijkervet@umcg.nl.
7 Department of Laboratory Medicine, University of Groningen and University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, the Netherlands. Electronic address: a.j.a.lambeck@umcg.nl.
8 Department of Internal Medicine, Division of Infectious Diseases, University of Groningen and University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, the Netherlands. Electronic address: w.f.w.bierman@umcg.nl.