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Additive manufacturing ( AM ) of highly viscous materials , e.g. , polysiloxane ( silicone ) has gained attention in academia and different industries , specifically the medical and healthcare sectors .
 Additive manufacturing, AM, materials, silicone, industries, medical
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:
 Additive manufacturing, AM, materials, silicone, industries, medical