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To investigate the transrectal and scrotal ultrasonographic features of acquired obstructive azoospermia and evaluate the role of ultrasonography in the location diagnosis of acquired obstructive azoospermia patients. Retrospectively analysis of 92 cases of acquired obstructive azoospermia in recent years. All the patients underwent transrectal and scrotal ultrasonography. The ultrasonographic features were observed of testis, epididymis, scrotal segment of vas deferens, seminal vesicle, ejaculatory duct and prostate. Eighty cases with

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BACKGROUND Adolescent idiopathic scoliosis is a common condition affecting 2.5% of the general population. Vertebral body stapling was introduced as a method of fusionless growth modulation for the correction of moderate idiopathic scoliosis (Cobb angles of 20-40°), and was claimed to be more effective than bracing and less invasive than fusion. The aim of this study was to assess the effect of vertebral body stapling on the stiffness of a thoracic motion segment unit under moment controlled load, and to assess the vertebral structura