Whereas the standard dogma of a decade ago would have been to routinely offer a combination regimen , several recent studies have suggested that sequential agent chemotherapy can result in similar long - term survival rates with somewhat lower levels of toxicity 十年前的标准方案为常规给予联合化疗,而最近的几个研究显示序贯化疗能产生相似的长期生存率且具有更低的毒性水平。