Authors: N J Talley; S F Phillips; A Haddad; L J Miller; C Twomey; A R Zinsmeister; R L MacCarty; A Ciociola Journal: Dig Dis Sci Date: 1990-04 Impact factor: 3.199
Authors: W E Whitehead; B Holtkotter; P Enck; R Hoelzl; K D Holmes; J Anthony; H S Shabsin; M M Schuster Journal: Gastroenterology Date: 1990-05 Impact factor: 22.682