https://www.gloshospitals.nhs.uk/media/documents/Oral_PPI_Guideline_e2H203Y.pdf
https://www.newtguidelines.com/SwallowingDifficulties.html
https://www.stgeorges.nhs.uk/service/therapies/speech-and-language-therapy/our-new-fluid-and-diet-terminology/iddsi-diet-levels-information/
https://www.nhsgrampian.org//globalassets/foidocument/foi-public-documents1---all-documents/Guide_EnteralTubeA.pdf
