[LONGITUDINAL]
input = {V, k, a}
EQUATION:
C = pkmodel(V,k)
DEFINITION:
y = {distribution=lognormal, prediction=C, sd=a}

[INDIVIDUAL]
input = {V_pop, omega_V, w}
EQUATION:
Vpred=V_pop*(w/70)
DEFINITION:
V = {distribution=lognormal, prediction=Vpred, sd=omega_V}