|The case report form, often referred to as CRF, is used to collect data as part of a clinical trial. CRFs consist of several data fields, where patient data are entered as numbers, letters or codes. Nowadays, eCRFs, electronic case report forms, are commonly used. eCRFs are usually set up as online platforms provided by specialised service providers. Paper-based CRFs often are carbon copies of report forms where data are entered. It is the advantage of eCRFs that they can be accessed from any computer, data entered are available in real-time and can be viewed by several parties. eCRFs are also required in the event that remote monitoring shall be performed.