Fig. 1From: Participation in patient support forums may put rare disease patient data at risk of re-identificationGroup Size for Analyzed Patients. The x axis represents the number of people in the US population that share the patient’s combination of indirect identifiers. The y axis is the number of patients in this study that were a part of a group of that size. Highlighted in red are the two group sizes which constitute a high risk for re-identificationBack to article page