1659
METHODS : With ethical approval , we studied 74 American Society of Anesthesiologists ( ASA ) , physical status class 1 and 2 patients scheduled for elective unilateral lower limb surgery .
 None
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:
 None