Fennell, D A Gastrointestinal haemorrhage associated with free-base (crack) cocaine. [electronic resource] - Postgraduate medical journal Jun 1995 - 377-8 p. digital Publication Type: Case Reports; Journal Article ISSN: 0032-5473 Standard No.: 10.1136/pgmj.71.836.377 doi Subjects--Topical Terms: AdultChronic DiseaseCrack Cocaine--adverse effectsGastrointestinal Hemorrhage--chemically inducedHumansMaleStomach Ulcer--chemically induced