文章已经放了多因素分析表格，及km生存曲线，且生存曲线没有交叉。审稿人提问“For the multivariate analysis, please also include total number of events. There is many covariates included in the model and 10 events per covariate is a limit. Also include a description of how the proportional hazard assumption was tested for.”请问如何回复审稿人