1621
A ready - made prosthesis is placed on the external side of the ribs vertically bridging the flailed chest segment , and fixed to the first upper and first lower intact rib as well as to the mobile segments of the affected ribs .
 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