Authors: P A Selwyn; D Hartel; V A Lewis; E E Schoenbaum; S H Vermund; R S Klein; A T Walker; G H Friedland Journal: N Engl J Med Date: 1989-03-02 Impact factor: 91.245
Authors: Young Sook Park; Dae Won Jun; Seong Hwan Kim; Han Hyo Lee; Yun-Ju Jo; Moon Hee Song; Nam In Kim; Jun Seok Lee Journal: World J Gastroenterol Date: 2008-08-28 Impact factor: 5.742