Titlebook: Unilateral Biportal Endoscopy of the Spine; An Atlas of Surgical Javier Quillo-Olvera,Diego Quillo-Olvera,Michael M Book 2022 The Editor(s)

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Diego Quillo-Olvera,Javier Quillo-Reséndiz,Isaac Morán Morales,Michelle Barrera-Arreola,Javier Quillvider and purchaser under a contracting relationship. The separation of purchaser and provider means that the purchaser has less information about the technology and conditions of production than the provider. The provider can exploit this to extract rent from the purchaser and/or engage in ineffici

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Unilateral Biportal Endoscopy for Complex Lumbar Disc Herniationse approaches to complex LDH. It is essential to identify the factors that increase the difficulty when performing surgery. The concept of “complex” LDH depends on numerous factors, not only on the surgeon’s experience but also on the degenerative diseases associated with herniated discs. As we will