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Color Doppler Ultrasound of Lower Extremity Varicose Veins: A Simple Grading of Sapheno-Femoral Junction Reflux.
Sik Huh, Suk Joo Hong, Shin Kee Kim, Sang Woo Park, Sun Hwa Hong, Yeon Soo Kim
J Korean Soc Ultrasound Med. 2011;30(4):251-256. Published online December 1, 2011
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