Hand GA, Shook RP, Paluch AE, Baruth M, Crowley EP, Jaggers JR, Prasad VK, Hurley TG, Hebert JR, O'Connor DP, Archer E, Burgess S, Blair SN. The energy balance study: the design and baseline results for a longitudinal study of energy balance. Res Q Exerc Sport. 2013 Sep; 84(3):275-86.