We've put some small files called cookies on your device to make our site work.
We'd also like to use analytics cookies. These send anonymous information about how our site is used to a service called Google Analytics & Hotjar Analytics. We use this information to improve our site.
Let us know if this is OK. We'll use a cookie to save your choice. You can read more about our cookies before you choose.
Authored by Debra de Silva, Department of primary care, The Evidence Centre, London, UK - Rachel Roberts, Department of primary care, The Evidence Centre, London, UK - Vijay Nayar, Department of primary care, NHS England, London, UK - Graham Rutt, Department of primary care, NHS England, London, UK - Simon Gregory, Department of primary care, NHS England, London, UK - Amjad Khan, Department of primary care, NHS Education for Scotland, Edinburgh, UK