@inbook{1201940655, author={John Murtagh and Clare Murtagh}, title={S}, booktitle={John Murtagh’s General Practice Companion Handbook, 8th Edition}, publisher={McGraw-Hill Education (Australia) Pty Ltd}, address={Sydney, Australia}, year={2022}, url={murtagh.mhmedical.com/content.aspx?aid=1201940655} }