source code of:
Fieß A, Schuster AK, Pfeiffer N, Nickels S (2017) Association of birth weight with corneal power in early adolescence: Results from the National Health and Nutrition Examination Survey (NHANES) 1999–2008. PLoS ONE 12(10): e0186723. https://doi.org/10.1371/journal.pone.0186723