Biomass fuels are the probable risk factor for chronic obstructive pulmonary disease in rural South China . Thorax , 2007 , 62.Risk of COPD from exposure to biomass smoke : a metaanalysia .10 .姚婉贞等,慢性阻塞性肺疾病诊治指南( 2013年修订版) .中华结核和呼吸杂志, 2013 , 36. ......