Specifically, ‘Breast Surgery’ data has been recoded as ‘General Surgery’ which is how it has been recorded historically. ‘
Yn benodol, mae data ‘Llawdriniaeth y Fron’ wedi’i ailgodio fel ‘Llawdriniaeth Gyffredinol’ gan mai dyma sut y mae’r data wedi’i gofnodi yn hanesyddol.