All images were acquired with an LSM700 AxioObserver laser scanning confocal microscope equipped with a plan Apochromat 40x/1.3 Oil DIC M27 (Zeiss, Oberkochen, Germany) objective, using a gallium arsenide phosphide photomultiplier tube (GaAsp-PMT) detector controlled by Zen black software (version 8.0.7.273, Zeiss, Oberkochen, Germany). After acquisition, images were processed using the Fiji ImageJ2 software (National Institutes of Health, Bethesda, MD, USA).
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