RT Journal Article SR Electronic T1 Gastrointestinal hemorrhage in mastocytosis JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 311 OP 314 VO 122 IS 3 A1 M. C. Belcon A1 S. M. Collins A1 M. F. Castelli A1 A. H. Qizilbash YR 1980 UL http://www.cmaj.ca/content/122/3/311.abstract