Parents, be warned: Some common child-rearing moves could end up hurting your kids in the long run. Although humans have been raising their young since the beginning of time, the best way to do it is still largely subjective depending on culture and preferences . While parents aim to set up their children for a successful life, pediatricians and childcare experts say that some mistakes could inadvertently cause the opposite effect. There are popular misconceptions about taking care of children that could affect their long-term health — and even cut into their life expectancy, experts say. Here are four mistakes parents make that could be shortening their kids’ lives, according to pediatricians.…