Berg, S.W. van den

energy children energy gap weight weight gain study energy balance group body weight balance energy storage kilogram 5-7 years body mass index energy efficiency height change age 2 5-7 efficiency health increase van den berg percentage storage estimate z-score difference energy expenditure energy requirement piama obesity 289-320 kj assumption population nn group 289-320 energy gap estimate value result growth body weight gain bmi data baseline table period manuscript body composition parent index bmi z-score measurement cohort account child expenditure netherland percentile design requirement status author energy gap estimates mite allergy distribution /overweight piama study study period baseline study population energy intake energy imbalance point dutch birth cohort study energy efficiencies /normal 4.8 kilograms birth <0.0001 environment