Past audits and more recent studies of MCCDs showed that only 55 percent of certificates were completed to a minimally accepted standard.
Dangosodd archwiliadau blaenorol ac astudiaethau mwy diweddar o Dystysgrifau Meddygol Achos Marwolaeth mai dim ond 55 y cant o dystysgrifau a gwblhawyd i’r safon ofynnol isaf.