Mañá, Juan, et al. “Granulomatous Cutaneous Sarcoidosis: Diagnosis, Relationship to Systemic Disease, Prognosis and Treatment”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, vol. 30, no. 4, Dec. 2013, pp. 268-81, https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2798.