Does anyone know anything about the Callan school in Gaegum?

 Does anyone have a good recommendation for a English speaking dentist in Busan?  I'm in Sinpyeong, but will go wherever.  I've read that the SanFrancisco Clinic is a little expensive, but I am looking for somewhere good.  I think I need some crown/gum work.  Any ideas?? Thanks!

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