The problem is that while there are lots of observational or cross sectional studies on soda and weight gain, there are very few studies which, by their design, can show cause and effect.

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In addition, its economy has collapsed under the weight of hyperinflation and its health care system is in a shambles, forcing some Zimbabweans to cross the border into South Africa for treatment.

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Clinton Newtown added more evidence to the difference in size and weight between the team's when he fell off a tackle on Whitehead only to see him cross the line four minutes later.

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Whether the participants underwent a flood of weight changes and were then compared back to their former selves in different states, the participants are cross-examined among other employees in the same company, the participants are cross-examined among employees in neighboring states, etc.

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