For individuals under 18, predict the spleen mass from height, weight, and gender, using equations from Ogiu et al.
spleen_mass_children(height, weight, gender)
Vector of heights in cm.
Vector of weights in kg.
Vector of genders (either 'Male' or 'Female').
A vector of spleen masses in kg.
Ring, Caroline L., et al. "Identifying populations sensitive to environmental chemicals by simulating toxicokinetic variability." Environment International 106 (2017): 105-118.