389
The cut - off level was defined as the mean optical density of the seronegative samples plus 3 standard deviations shown as a line on the graphs in Fig .
 Anatomy: samples
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities: samples 
Answer:
 Anatomy: samples