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A silver disk ( 1 cm), covered on one face with tape, was suspended in the solution for 2 days, inducing the spontaneous electrochemical deposition of polonium isotopes on the disk

Endophytes are microorganisms that colonize some or all of the life cycle of plant tissues or organs without causing adverse plant symptoms, including endophytes, bacteria, and actinomycetes

Some of these substances, such as heavy metals and volatile organic compounds, can pose health risks when inhaled

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The study protocol was approved by the Ethics Committee of Beijing Huilongguan Hospital, and written informed consent was obtained from all patients