17677
An overview of this important topic is needed to highlight current advances and provide a clear understanding of the ultimate goal in CSD research - develop a graft for clinical use that effectively treats the orthopedic conundrum of segmental bone loss .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None