RETRACTION
Volume 88, no. 2, p. 1318–1331, 2014, https://doi.org/10.1128/JVI.02351-13. We have been alerted that in Fig. 4, lanes 7 and 12 and lanes 8 and 11 look more similar than expected upon retrospective inspection under magnification, and we immediately informed the journal. Since 8 years have passed since publication, investigation with original research materials is impossible. Therefore, we now retract this paper.