In general, it is best to use REDCap as your primary tracking mechanism. However, if desired, you may use a spreadsheet to track screened patients – for example, if your site has multiple recruiters and physicians and would like to use a shared spreadsheet to avoid duplicate screening log entries. Please make sure any additional tracking document that is created is stored only on a local, password-protected hard drive. It must be saved in a secure location if it will contain protected health information (PHI). Do not allow non-study personnel to access the document.