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Fan H W, Marcopito L F, Cardoso J L C, França F O S, Malaque C M S, Ferrari R A et al.
Sequential randomised and double blind trial of promethazine prophylaxis against early anaphylactic reactions to antivenom for bothrops snake bites
BMJ 1999; 318 :1451
doi:10.1136/bmj.318.7196.1451