(8) A statement that participation is voluntary, refusal to participate will involve no penalty or loss of benefits to which the subject is otherwise entitled, and the subject may discontinue participation at any time without penalty or loss of benefits to which the subject is otherwise entitled.

From a public health perspective, the effectiveness of e-cigarettes for smoking cessation must be assessed by examining how effective the product is for smokers who are trying to quit. When you do that properly, this initial evidence suggests that you find out e-cigarettes are a viable smoking cessation aid for a subset of smokers.

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