Murdaca, G., P. Cagnati, and F. Puppo. “Soluble HLA G Serum Levels in Patients With the Acquired Immunodeficiency Syndrome Affected by Different AIDS-Defining Conditions before and After Anti-Retrovirel Treatment”. Journal of Biological Research - Bollettino della Società Italiana di Biologia Sperimentale 84, no. 1 (January 30, 2011). Accessed July 3, 2020. https://www.pagepressjournals.org/index.php/jbr/article/view/4656.