2.1 nanogram a microgram

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1.6 nanogram a microgram 1.7 nanogram a microgram 1.8 nanogram a microgram 1.9 nanogram a microgram 2 nanogram a microgram 2.1 nanogram a microgram 2.2 nanogram a microgram 2.3 nanogram a microgram 2.4 nanogram a microgram 2.5 nanogram a microgram

6.2 nanogram a microgram 6.8 nanogram a microgram 1.9 nanogram a microgram 8.3 nanogram a microgram 0.9 nanogram a microgram 7.4 nanogram a microgram 6.9 nanogram a microgram 7.1 nanogram a microgram 8.3 nanogram a microgram 4.7 nanogram a microgram

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