2035
Eight-week subcutaneous implantation in vivo showed no signs of a foreign body response , while connective tissue ingrowth was promoted by the layer-by-layer coating .
 subcutaneous, implantation, layer-by-layer, coating
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 subcutaneous, implantation, layer-by-layer, coating