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Age-matched weight in male and female pediatrics from newborn to 5 years. The middle gray line represents the median and the outer gray lines are 95% prediction interval of the 10,000 simulated weights by the age. The WHO data are represented by black lines: 
, median; 
, 80% confidence interval (CI); 
, 90% CI; 
, 95% CI of WHO growth charts. Source data from World Health Organization
