A method of detecting and diagnosing the probable presence of lung cancer in a mammal, including a human, comprising collecting a measured quantity of alveolar breath from the mammal; analyzing the collected breath for the presence of a marker for lung cancer; determining a first mean alveolar gradient...http://www.google.de/patents/US5996586?utm_source=gb-gplus-sharePatent US5996586 - Breath test for detection of lung cancer
