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Loop Quantum Gravity falsified?

In the Wikipedia article "Loop Quantum Gravity" one can read

ESA's INTEGRAL satellite measured polarization of photons of different wavelengths and was able to place a limit in the granularity of space that is less than $10^{-48}$ m or 13 orders of magnitude below the Planck scale.

What is the present status of this experiment? Does it mean that LQG is falsified?