Table 1.

The basic composition and content of the cohort

Cohort	Data Sources	Number of cases	Male	Female	M‐F	Included information
First cohort	BORALS	283	179	104	1.72	Demographic data (including residence, occupation, and lifestyle habits.), clinical data (time of onset, site of onset, time of diagnosis, diagnostic hospital, treatment, and basic body condition, etc.) The patients of the BORALS came from different hospitals: PUTH, The General Hospital of the People's Liberation Army (PLAGH), Peking Union Medical College Hospital (PUMCH), Beijing Tian Tan Hospital (BJTTH), Xuanwu Hospital Capital Medical University (XWHOSP), Beijing Boren Hospital (BBH), The General Hospital of the Navy PLA (NPLAGH), The General Hospital of Chinese people's Armed Police Force (CAPFGH). Among them, a few patients came from BBH, NPLAGH, and CAPFGH, which are represented by “other.”
Second cohort	PUTH	562	346	216	1.60	Patient name, gender, age, date of diagnosis, diagnosis result, residence, and other basic outpatient information
Third cohort	Merge and delete overlap	680	421	259	1.63	The intersection of the above two datasets, and the same as the second cohort

M‐F: Male‐to‐female ratio.