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Conclusion: These results suggest the ECDI as a valid and reliable index to be used in Colombian samples
Next, this matrix is used to create a Gower's centered matrix , in which n is the number of participants, I is the n n identity matrix, and 1 is a vector of n 1s
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Here, we discuss each papers findings in detail and critically appraise the strengths and weaknesses of each study, organized first by main finding (whether or not a significant association between EC use and respiratory outcome was found in at least one study) and next by age group
However, these are generally produced at lower levels than with conventional cigarettes
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