James equation (and therefore Minto model)

[jplomas]

James equation for short stature individuals returns a negative LBW which will, in turn, return negative compartment volumes using the Minto model.

https://academic.oup.com/bja/article/106/5/719/279817

However, these equations, which are based on previously described relations between total body water (TBW), LBM, height and weight,3,4 are not applicable to children, often giving nonsensical estimates for LBM, including negative values.

Suggest minimum weight 30kg and height 100cm for use of Minto model and throwing of errors in james if returned lbm is a negative value.