Safety of COVID-19 Vaccination in Patients With Breast Cancer: Cross-Sectional Study in China - Shaohua Zhang; Jianbin Li; Ruonan Xu; Qianjun Chen; Gang Sun; Ying Lin; Yali Cao; Yiding Chen; Cuizhi Geng; Yuee Teng; Jianyun Nie; Xinzheng Li; et al. (JMIR Public Health and Surveillance, 2023)