NCI Cancer Data Access System

NCI癌症数据访问系统(CDAS)是由美国国家癌症研究所(NCI)维护的官方数据库，允许用户从各种研究项目中请求数据、图像或生物标本。该系统提供广泛的文档资料和可搜索的研究项目与出版物数据库，用户需通过身份验证才能访问。系统包含多项大型癌症研究数据，如前列腺、肺、结直肠和卵巢癌筛查试验(PLCO)等。The NCI Cancer Data Access System (CDAS) is an official database maintained by the U.S. National Cancer Institute (NCI). It allows users to request data, images, or biological specimens from various research projects. The system provides extensive documentation and a searchable database of research projects and publications, with access requiring user authentication. The system hosts multiple large-scale cancer research datasets, such as the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial (PLCO), among others.