11991
Guidelines for performing a routine spiral assay are presented , and alternative test methods intended to overcome a variety of technical difficulties ( such as restricted sample availability , sample viscosity or volatility , etc . ) are recommended .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None