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| Application of Ultrasound-guided Femoral-popliteal Fossa Sciatic Nerve Block in Operation of Unilateral Great Saphenous Vein Varicosis in Senile Patients with Hypertension |
| LYU Aiping |
| First-author's address: The Second Hospital of Longyan, Fujian Province, Longyan 364000, China |
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