Increased post-operative cardiopulmonary fitness in gastric bypass patients is explained by weight loss. - Lund, M. T.; Hansen, M.; Wimmelmann, C. L.; Taudorf, L. R.; Helge, J. W.; Mortensen, E. L.; Dela, F. (Scandinavian Journal of Medicine & Science in Sports (John Wiley & Sons, Inc.), 2016)