Before revision:  We used 17,486 gigapixel whole slide images  spread over 18 URLans for training a multi-task deep model to simultaneously identify  primary or metastatic status and site of origin.
After revision:  We used 17,486 gigapixel whole slide images with known primaries spread over 18 URLans for training a multi-task deep model to simultaneously identify primary or metastatic status and site of origin.