Table 1. Source and utilization of ultrasound data.

Subset	Hospitals	Participants	Exams	–Videos	+Videos
Training	1	56	63	372	323
Tuning	2	24	24	71	122
Holdout	2	27	30	146	159
Adult training	6	44	102	843	498

–Videos = consolidation feature not present; +Videos = consolidation feature present