Table 1.

Description of the Datasets in the Present Study

Dataset	Raw reads (median)	Reads after filtering low quality and short reads	Cleaned reads	Sequencing platform
KAHSs (n = 67)	9958	3761	2861	GS Junior
HMPHSs (n = 325) (processed data used)	—	13974	10884	GS FLX
HKAs (n = 1463)	42,379	10,940	12,405	Illumina Miseq
IAHSs (n = 10)	14,285	5606	5398	GS FLX

HKAs, healthy Korean adults; HMPHSs, Human Microbiome Project healthy samples; IAHSs, Italian adolescent healthy samples; KAHSs, Korean adolescent healthy samples.