CLCA2 and lung cancer: Man et al. [24] found that cytokeratin 7(CK7), Ca2+-activated chloride channel-2(CLCA2), hyaluronan-mediated motility receptor(HMMR), and human telomerase catalytic subunit(hTERT) could be detected in 74.0% of 254 lung cancer patients and present a reliable prognosis value.