A study published in the European Respiratory Journal offers insight on dogs' ability to sniff out lung cancer. Though previous studies have shown the possibilities, this research found that dogs were equally accurate in identifying smokers and nonsmokers. "This is a big step forward in the diagnosis of lung cancer, but we still need to precisely identify the compounds observed in the exhaled breath of patients," said author Thorsten Walles, MD, of Schillerhoehe Hospital in Gerlingen, Germany.

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