[1
]
Resident, Department of Oral and Maxillofacial Diseases, University of Helsinki, and
Helsinki University Hospital, Helsinki, Finland. Electronic address: aleksi.haapanen@helsinki.fi.
[2
]
Professor, Department of Oral and Maxillofacial Surgery, University of Turku, and
Turku University Hospital, Finland.
[3
]
Consultant, Department of Oral and Maxillofacial Diseases, University of Helsinki,
and Helsinki University Hospital, Helsinki, Finland.
[4
]
Professor, Department of Oral and Maxillofacial Surgery, Kuopio University Hospital,
and University of Eastern Finland, Institute of Dentistry, Kuopio, Finland.