Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Romain Zufferey and John E. Donello and Didier Trono and Thomas J. Hope,Woodchuck Hepatitis Virus Posttranscriptional Regulatory Element Enhances Expression of Transgenes Delivered by Retroviral Vectors,Journal of Virology,0022-538X,American Society for Microbiology,1999-04,73,4,2886-2892,https://cir.nii.ac.jp/crid/1360011144422593408,https://doi.org/10.1128/jvi.73.4.2886-2892.1999