27713
Influence of the Molecular Structure of Surface - Attached Poly ( N - alkyl Acrylamide ) Coatings on the Interaction of Surfaces with Proteins , Cells and Blood Platelets .
 Poly ( N - alkyl Acrylamide )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Poly ( N - alkyl Acrylamide )