%0 Journal Article %T An immuno-assay to quantify influenza virus hemagglutinin with correctly folded stalk domains in vaccine preparations %A Ericka Kirkpatrick %A Fatima Amanat %A Florian Krammer %A Madhusudan Rajendran %A Peter Palese %A Phillip Comella %A Raffael Nachbagauer %A Teddy John Wohlbold %A Weina Sun %J Archive of "PLoS ONE". %D 2018 %R 10.1371/journal.pone.0194830 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5884525/