Secular trends and determinants of influenza vaccination uptake among patients with cardiovascular disease in Korea: Analysis using a nationwide database oleh Min Kim, Bumhee Yang, Seonhye Gu, Eung-Gook Kim, So Rae Kim, Kyeong Seok Oh, Woong-Su Yoon, Dae-Hwan Bae, Ju Hee Lee, Sang Min Kim, Woong Gil Choi, Jang-Whan Bae, Kyung-Kuk Hwang, Dong-Woon Kim, Myeong-Chan Cho, Hyun Lee, Dae-In Lee