This is the dilemma doctors now face with Lucentis (which was originally developed to treat wet AMD and which passed all the regulatory protocols for doing so here in the US and in Europe) and Avastin, a drug with a similar underlying mechanistic effect, that was, however, designed to treat cancer.

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The study found a similar beneficial effect for people with cataracts who don't normally get a lot of lutein and zeaxanthin in their diet.

WSJ: The Crucial Years for Protecting Your Eye Health

The United States is headed down a similar path, with stricter Corporate Average Fuel Economy standards going into effect over the next several years.

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In theory, lots of tiny, bustling investors should have a similar effect--keeping stocks pretty much suspended, with only slow changes.

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The researchers pointed out the findings were consistent with, and of a similar magnitude to, those found for breast cancer although they did not see a cumulative effect.

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In six cases, it was possible to compare the effect of the new methods with a control area, where levels of disorder and police resources were similar.

ECONOMIST: Policing