1294
METHODS : This was a prospective , single - intervention study of consenting adult patients undergoing procedural sedation with propofol between December 28 , 2002 , and October 31 , 2003 .
 Chemical: propofol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: propofol