Erratum to: Effect of Age on Relative Effectiveness of High-Dose Versus Standard-Dose Influenza Vaccines Among US Medicare Beneficiaries Aged ≥65 Years. (17th October 2019) - Lu, Yun; Chillarige, Yoganand; Izurieta, Hector S; Wei, Yuqin; Xu, Wenjie; Lu, Michael; Sung, Heng-Ming; Lindaas, Arnstein; Wernecke, Michael; Macurdy, Thomas; Kelman, Jeffrey; Forshee, Richard A