RT期刊文章SR电子T1把粘液t and physiotherapy--a new series JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 949 OP 950 VO 13 IS 5 A1 Hill, SL A1 Webber, B YR 1999 UL //www.qdcxjkg.com/content/13/5/949.abstract AB