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They still use a 2 ml pod, because that is the legal limit for the tank itself, but the pod is topped up from a prefilled refill container that comes with the kit

Additional study authors include Christopher Anderson and Yue-Lin Zhuang at UC San Diego Moores Cancer Center, Hai-Yen Sung at the Institute of Health and Aging at UC San Francisco, and Anthony Gamst at the Computational and Applied Statistics Laboratory in the San Diego Supercomputer Center and Department of Mathematics at UC San Diego

It is also necessary to provide information on the authenticity, year of issue, country of origin and physical condition, backed up by a clear, sharp photograph

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You can check for yourself by looking at batch-specific, third-party lab reports for any particular product youre curious about