Authors
Mark Johnson
MDS(Otago), MFGDF(UK)Specialist practice, Orthodontics, New Zealand
Michael Harkness
michael.harhess@dent.otago.ac.nz
BDS(NZ), MSc(Wales), PhD(Otago), FRACDS, DOrth RCS(Eng), Associate Professor, Orthodontics, University of Otago, New Zealand