According to {TAIL ~ the method} a test pad containing the peroxygen agent is wetted with a solution of guaiac in alcohol prior to removal from the protective foil package and {HEAD ~ exposure} to a specimen of fecal material and water in a test for occult blood 
According to { TAIL ~ the method } a test pad containing the peroxygen agent is wetted with a solution of guaiac in alcohol prior to removal from the protective foil package and { HEAD ~ exposure } to a specimen of fecal material and water in a test for occult blood
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