Sarvari, Jamal, Razieh Dowran, Seyed Younes Hosseini, Mohammad Reza Fattahi, and Nasrollah Erfani. “Association of PD-1 Gene With Outcome of Hepatitis C Virus Infection”. EXCLI Journal 17 (September 24, 2018): 935-944. Accessed January 23, 2020. https://www.excli.de/index.php/excli/article/view/649.