Waraporn Waikakul และ Thewarug Werawatganon. (2009) Combination of gabapentin and celecoxib for analgesia after major orthopedic surgery : a randomized controlled trial comparing the combination and either gabapentin or celecoxib alone. Chulalongkorn University:ม.ป.ท.Waraporn Waikakul และ Thewarug Werawatganon. 2009. Combination of gabapentin and celecoxib for analgesia after major orthopedic surgery : a randomized controlled trial comparing the combination and either gabapentin or celecoxib alone. ม.ป.ท.:Chulalongkorn University;Waraporn Waikakul และ Thewarug Werawatganon. Combination of gabapentin and celecoxib for analgesia after major orthopedic surgery : a randomized controlled trial comparing the combination and either gabapentin or celecoxib alone. ม.ป.ท.:Chulalongkorn University, 2009. Print.