Pediatric growth standard based on LMS data from the CDC and WHO.
cppPGSF(metric, source, male, x, qp, type)
string, for example bmi_for_age
string, CDC or WHO
integer, 0 = female; 1 = male
is the age (in months), length (cm) or height (cm) as needed for the metric.
the quantile or percentile, whichever is relevant for the type
quantile, distribution, or zscore
expect to call this from R after checking some functional arguments within R.