“…1993;Peters-Golden et al, 1985;Roumm and Medsger, 1985 Idiopathic pulmonary Stereotyped inflammatory Hubbard et al, 2000;Park et al, 1999; fibrosis (cryptogenic response of alveolar wall to injury. Harris et al, 1998;Lee et al, 1996;Nagai fibrosing alveolitis) et al, 1992;Enomoto et al, 1985;Turner-Warwick et al, 1980 Silicosis Crystalline silica (e.g., quartz, sand) Holland, 1990;Tashiro et al, 1990;Amandus and Costello, 1991;Dong et al, 1995;Wang et al, 1996;Weill and McDonald, 1996;Brown et al, 1997 Subclinical infection Human Pneumocystis de la Horra et al, 2004 Table 3 lists studies reporting a positive association between benign lung diseases and lung cancer. Chronic bronchitis is a benign disease of the airways defined clinically by the chronic presence of cough and sputum production (Nadel, 2002).…”