EfficacyofBiportalEndoscopicSpineSurgeryforLumbarSpinalStenosisAbstractBackground Biportalendoscopicspinesurgery(BESS)isarecentadditiontominimallyinvasivespinesurgerytreatments.Itboastsexcellentmagnificationandfinediscriminationofneuralstructures.Selectivede
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