[LONGITUDINAL]
input = {V, Cl}

EQUATION:
C = pkmodel(V, Cl)

;--------------------------------------------
[INDIVIDUAL] ; variability levels = {id, occ1, occ2}
input = {V_pop, o_V0, o_V1, o_V2, Cl_pop, o_Cl0, o_Cl1}

DEFINITION:
V  = {distribution=logNormal, reference=V_pop,  varlevel={id,id*occ1,id*occ1*occ2}, sd= {o_V0,o_V1,o_V2}}
Cl = {distribution=logNormal, reference=Cl_pop, varlevel={id,id*occ1}, sd= {o_Cl0,o_Cl1}}
