“…In terms of registry scope, 15 of the 24 included studies reported using national registries for trial pre-screening (Supplementary material 4 , papers 12/18/20/16/10/9/13/21/24/14/4/8/5/6/23) (respectively [ 42 , 43 , 45 , 46 , 48 – 51 , 54 , 57 – 59 , 62 , 63 , 65 ]), and 9 of 24 studies reported using local registries (Supplementary material 4 , papers 22/17/24/1/19/7/2/5/3) (respectively [ 44 , 53 – 56 , 60 – 62 , 64 ]). Local registries were either at a state level (Supplementary material 4 , papers 17 and 19) [ 53 , 56 ], or a specific site level (Supplementary material 4 , papers 22/1/7/2/3) (respectively [ 44 , 55 , 60 , 61 , 64 ]). Two included studies reported using a combination of local and national registries (Supplementary material 4 , papers 24 and 5) [ 54 , 62 ].…”