Neumayer L, Jonasson O, Fitzgibbons R, Henderson W, Gibbs J, Carrico CJ, Itani K, Kim L, Pappas T, Reda D, Dunlop D, McCarthy M, Hynes D, Giobbie-Hurder A, London MJ, Hatton-Ward S. Tension-free inguinal hernia repair: the design of a trial to compare open and laparoscopic surgical techniques. J Am Coll Surg. 2003 May; 196(5):743-52.