How can energy balance be achieved by free-living human subjects?

@article{Castro1997HowCE,
  title={How can energy balance be achieved by free-living human subjects?},
  author={J. Mart{\'i}nez-V{\'a}zquez de Castro},
  journal={The Proceedings of the Nutrition Society},
  year={1997},
  volume={56 1A},
  pages={
          1-14
        }
}