Authors: Joseph M Neal; Christopher M Bernards; Admir Hadzic; James R Hebl; Quinn H Hogan; Terese T Horlocker; Lorri A Lee; James P Rathmell; Eric J Sorenson; Santhanam Suresh; Denise J Wedel Journal: Reg Anesth Pain Med Date: 2008 Sep-Oct Impact factor: 6.288