Institution: | 1. Department of Oral and Maxillofacial Surgery, Central Hospital, Västerås, SE-721 89 Västerås, Sweden;2. Department of Medical Sciences, Uppsala University, SE-751 85 Uppsala, Sweden;3. Department of Pharmacovigilance, Medical Products Agency, SE-752 37 Uppsala, Sweden;4. Department of Oral Pathology, Malmö University, SE-205 06 Malmö, Sweden |