Impact of 23-valent pneumococcal polysaccharide vaccination on the frequency of pneumonia-related hospitalization and survival in elderly patients with prostate cancer: A seven-year nationwide matched cohort study

Chung Yi Li, Liang Cheng Chen, Hon Yi Lin, Moon Sing Lee, Shih Kai Hung, Chun Liang Lai, Li Wen Huang, Ben Hui Yu, Feng Chun Hsu, Wen Yen Chiou