def merge_attribute(attribute, newval, matches=nil)
      if attribute == :participant_medical_identifiers and newval then
        CaTissue::Participant.remove_phantom_medical_identifier(newval)
      end
      super
    end
def merge_attribute(attribute, newval, matches=nil)
      if attribute == :participant_medical_identifiers and newval then
        CaTissue::Participant.remove_phantom_medical_identifier(newval)
      end
      super
    end
def merge_attribute ( attribute , newval , matches = nil ) if attribute == :participant_medical_identifiers and newval then CaTissue :: Participant . remove_phantom_medical_identifier ( newval ) end super end
Overrides +CaRuby::Mergable.merge_attribute+ to work around the caTissue
  bugs described in {CaTissue::Participant.remove_phantom_medical_identifier}.
Overrides + CaRuby :: Mergable . merge_attribute + to work around the caTissue bugs described in { CaTissue :: Participant . remove_phantom_medical_identifier } .