[1
]
Private Practice, Southampton, United Kingdom.
[2
]
Department of Endodontics, Faculty of Dentistry, Oral and Craniofacial Sciences, Guy's
Dental Hospital, London, United Kingdom; Department of Therapeutic Dentistry, I.M.
Sechenov First Moscow State Medical University, Moscow, Russia.
[3
]
Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University
of Zurich, Zurich, Switzerland.
[4
]
Department of Endodontics, School of Dentistry, National and Kapodistrian University
of Athens, Athens, Greece. Electronic address: gtzanet@dent.uoa.gr.