On page 1052, the last two column headings in Table 1 lacked the correct superscripting. The correct column headings are "particles/ml a " and A20+capsids/ml b ." On page 1053, the column headings for Table 2 were shifted. The correct table is printed below.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.