863
However , taken collectively , the results may not be directly comparable since these studies have used different approaches to assign species - from comparing spectra from test organisms to reference spectra in MALDI - TOF MS databases [ 16 ] , [ 20 ] , to enhancing these databases , and in some instances developing study - specific databases , with " in - house " spectral signatures [ 14 ] , [ 15 ] .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 None