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Olfactory detection of human bladder cancer by dogs: Another cancer detected by “pet scan”

BMJ 2004; 329 doi: (Published 25 November 2004) Cite this as: BMJ 2004;329:1286
  1. James S Welsh, associate professor of human oncology (
  1. University of Wisconsin-Madison, Madison, WI 53792, USA

    EDITOR—Before the study by Willis et al there was only sparse, anecdotal evidence suggesting that dogs might truly be able to detect human malignancies.1 Their study complements a recent study in which dogs were trained to identify melanoma in tissue samples …

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