Table 2.

Distribution of hospitals and patient samples featured in the 5-fold validation sets and hold-out test set.

	Hospital-wise cross-validation set					Hold-out set
Fold	0	1	2	3	4
Hospitals validation	STO	GRO, MIL UTR	SFR, VIE	PAR, ZWO ALK, HAG	GOT	AMS
Patients train	646	732	730	728	696	—
Patients validation	237	151	153	155	187	73