“…Although the population size is smaller than that of the NHI database, the CGRD contains more clinical information (laboratory results, examination and pathological reports, medical and nursing records) than the NHI database. To date, CGRD has been widely used to establish real-world evidence studies in many fields [ [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] ]. However, previous studies pointed out that selection bias and loss of follow-up were two major limitations of CGRD [ 2 , 4 , 5 , 8 , 16 ].…”