id	keyword
crl-14880	sample
crl-14880	sampling
crl-14880	research
crl-14880	size
crl-14880	statistical
crl-14880	sample size
crl-14880	library
crl-14880	methods
crl-14880	population
crl-14880	selection
crl-14880	error
crl-14880	level
crl-14880	probability