[1] Univ Groningen, Dept Pathol & Med Biol, Groningen, Netherlands
[2] Univ Groningen, Dept Plast Surg, Groningen, Netherlands
[3] Univ Med Ctr Groningen, Hanzepl 1, NL-9713 GZ Groningen, Netherlands
[4] Univ Med Ctr Utrecht, Dept Plast Surg, Utrecht, Netherlands
[5] Erasmus Univ, Med Ctr, Med Fac, Rotterdam, Netherlands
[6] Great Ormond St Hosp Sick Children, Craniofacial Unit, London, England
[7] UCL Great Ormond St Inst Child Hlth, London, England
[8] Univ Groningen, Dept Pathol & Med Biol, Groningen, Netherlands
[9] Velthuis Clin, Rotterdam, Netherlands
[10] Univ Groningen, Dept Plast Surg, Groningen, Netherlands
[11] Bey Bergman Clin, Heerenveen, Hilversum, Netherlands
[12] Bey Bergman Clin, Zwolle, Netherlands