Corrigendum to "Isosteric replacements of the carboxylic acid of drug candidate VX-787: Effect of charge on antiviral potency and kinase activity of azaindole-based influenza PB2 inhibitors" [Bioorg. Med. Chem. Lett. 25 (2015) 1990–1994]. Issue 1 (1st January 2016) - Boyd, Michael J.