At least 5 differential diagnoses must be provided, although you can add up to another 5 differential diagnoses by clicking on the "Add new diagnoses" button at right. You then need to select at least one as the expert diagnosis, by checking the "Correct" box(es). Remember to save your work before moving to the next step – you will in any case be reminded to do so if you attempt to navigate away from the page without clicking the "Save" button.