Contour enhanced funnel plot for the random effects meta-analysis of the mean difference in total daily energy intake (kcal/day), based on breakfast consumption or no breakfast consumption. 1 kcal=4.18 kJ=0.00418 MJ. Contour enhanced funnel plot for the random effects meta-analysis of the mean difference in total daily energy intake (kcal/day), based on breakfast consumption or no breakfast consumption. 1 kcal=4.18 kJ=0.00418 MJ Katherine Sievert et al. BMJ 2019;364:bmj.l42 ©2019 by British Medical Journal Publishing Group