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BACKGROUND Single-cell RNA sequencing (scRNA-seq) is an emerging technology that can assess the function of an individual cell and cell-to-cell variability at the single cell level in an unbiased manner. Dimensionality reduction is an essential first step in downstream analysis of the scRNA-seq data. However, the scRNA-seq data are challenging for traditional methods due to their high dimensional measurements as well as an abundance of dropout events (that is, zero expression measurements). RESULTS To overcome these difficulties, we pro

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Spinal dural arteriovenous fistulas (AVFs) have been categorized on the basis of the Anson and Spetzler classification into 4 types. Type I is the most common type and describes an abnormal connection between a radicular artery at the nerve root sleeve and an intradural draining vein. This communication results in progressive dilatation and mass effect from the draining vein experiencing arterial pressures without intervening arterioles. In this patient, preoperative angiography showed a type I dural AVF. A laminoplasty was performed