Selection Bias, Eligibility Criteria, and Interpreting Trial Results (or, a little cynicism can be a good thing)
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My kids are right in the middle of that time when they watch SpongeBob and see commercials for toys, cereals, and music, nearly every one is puncuated at the end with, "Daddy, can we get that? I want that." There comes a time in everyone's life, hopefully early on, when we learn that we won't actually find eternal bliss with every advertised item.