Authors: Michael Pignone; Melissa Rich; Steven M Teutsch; Alfred O Berg; Kathleen N Lohr Journal: Ann Intern Med Date: 2002-07-16 Impact factor: 25.391
Authors: S Singla; D Keller; P Thirunavukarasu; D Tamandl; S Gupta; J Gaughan; D Dempsey Journal: J Gastrointest Surg Date: 2012-03-27 Impact factor: 3.452