By Wray MD BDS MB ChB FDSRCPS FDSRCS(Edin), David, Gibson PHD BDS MB ChB FDS(OM) RCPS(Glasg) FFDRCS(Irel) FDSRCS(Edin), John
By Chestnutt BDS MPH PhD FDS(DPH) RCS(Edin) DDPHRCS(Eng) FDS RCS(Eng) FDS RCPS(Glasg) MFPH, Ivor G., Gibson PHD BDS MB ChB FDS(OM) RCPS(Glasg) FFDRCS(Irel) FDSRCS(Edin), John