28
MRS allowed the differentiation of the following metabolites in 5 patients : N - acetyl - aspartate ( NAA ) , creatine and phosphocreatine , phosphorylcholine and glycerophosphorylcholine , beta - and gamma - glutamate ( GLU ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None