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trachea vs. pool
thyroid vs. pool
thymus vs. pool
testis vs. pool
stomach vs. pool
spleen vs. pool
spinal cord vs. pool
jejunum vs. pool
ileum vs. pool
duodenum vs. pool
skin vs. pool
salivary gland vs. pool
retinal vs. pool
prostate vs. pool
placenta vs. pool
pituitary gland vs. pool
ovary vs. pool
skeletal muscle vs. pool
mammary gland vs. pool
lymph node vs. pool
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