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. 2014 Jan 8;90(1):75–79. doi: 10.4269/ajtmh.13-0341

Figure 1.

Figure 1.

World Health Organization Informal Working Group on Echinococcosis (WHO-IWGE) Classification of Echinococcus granulosus cyst stages on ultrasound3 with specification of CE3 cyst sub-classification in CE3a and CE3b, according to their different activity in functional studies.4