Table 1. A summary of the process to identify 1013 true pairs of CTG-CTRI records.

	Step	Number of records
1	CTRI records with an NCT ID in the secondary ID field	968
2	CTG records with a CTRI ID in the secondary ID field	102
3	Total number of either CTRI or CTG records that identified each other	1070
4	CTRI and CTG records that both identified each other	57
5	Unique CTG-CTRI pairs, identified either from the CTG or CTRI records	1013