Crellin, E, Mansfield, KE, Nitsch, D, Douglas, IJ, Root, A, Williamson, E, Smeeth, L and Tomlinson, LA (2017). Clinical Code List - Read Codes - Urinary Calculi. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.244.