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None of the serum samples were found to be positive by sperm agglutination or sperm immobilization methods and antibodies were detected by an immunobead assay on the sperm cells of one of the 13 men examined .
 Anatomy: serum samples; Anatomy: sperm; Anatomy: sperm; Anatomy: sperm cells
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: serum samples; Anatomy: sperm; Anatomy: sperm; Anatomy: sperm cells