 This is a single center academic study at two timepoints with an interval of 12 months. The data collection includes demographic variables, patient-reported variables, clinical variables and healthcare professionals-reported variables. All SSc and SLE patients who meet the inclusion criteria and are monitored by the rheumatology consultation in the University Hospitals Leuven will be contacted to participate in the study. Patients will be informed of the purpose of the study and what is expected of them. If they agree to participate they will also be asked to sign the Informed Consent form to send together with the completed questionnaire by mail. 