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Eight randomly assigned 4 x 4 - cm2 pieces of two different meshes were fixed in the preperitoneal space with a centrally placed single suture .
 Anatomy: preperitoneal space
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: preperitoneal space