Ichimura, Yohei, et al. “Serum Angiopoietin-Like Protein 3 Levels: Possible Correlation With Progressive Skin Sclerosis, Digital Ulcers and Pulmonary Vascular Involvement in Patients With Systemic Sclerosis”. Acta Dermato-Venereologica, vol. 94, no. 2, Aug. 2013, pp. 157-62, doi:10.2340/00015555-1680.