CS_file_dictionary
1. user_name: Citizen Scientist user name or IP for anonymous scoring.
2. image_name: identification of the images before the segmentation.
3. image_url: identification of the sub-image.
4. cancer_cell: 0= Citizen Scientist did not identify cancer cells in the sub-image; 1= Citizen Scientist identified cancer cells in the sub-image.
5. amount: amount of cancer cells identified in the sub-image. 
6. proportion: proportions of cancer cells that are positive for estrogen receptor.
7. intensity: intensity of the positivity.
8. study: study fro BCAC.
9. grade: tumor grade.
10. stage: tumor stage
11. er: estrogen receptor status from BCAC (0=negative; 1=positive).
12. age: age of the patient at diagnosis.
13. Allred: value of the score attributed to the image by a pathologist in SEARC study.
14. UPS: user performance score.
15. breast_death: death from breast cancer.
16. follow_time: time of follow up in years
17. entry_time: time between the diagnosis and the entry in the study.