ADJ

blood, DNA, faecal, RNA, rock, serum, tissue, urine, etc.
biopsy, clinical

VERB + SAMPLE

collect, take
provide
All the athletes had to provide a urine sample
analyse, study, test

SAMPLE + NOUN

book
We looked at sample books to choose the furniture fabric
bottle

PREP

~ of
samples of tissue

ADJ

small
large, wide
population
representative
random

VERB + SAMPLE

draw
a sample drawn from men aged 35?40

SAMPLE + VERB

comprise sth, consist of sth
Our sample comprised 250 catering workers

SAMPLE + NOUN

size
A larger sample size yields more reliable data
survey
group

PREP

~ of
a wide sample of people