Fig. 1. Preparation of CSC. Smoke derived from burning cigarettes was drawn slowly into a silicone tube and a conical flask containing CBHK. The CSC-rich CBHK was then sterilized by filtration through 0.22-µm sterile filters and stored at 4°C until use.

Korean J. Microbiol. 2022;58:1-11 https://doi.org/10.7845/kjm.2022.2007

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