| 题名 | Combinied therapy with tiotropiium and formioterol in chronic obstructive pulmonary diseiase: effect on the 6-miniute walk test |
| 链接 | www.ncbi.nlm.nih.gov/pubmed/23875741 |
本帖最后由 bqcool 于 2013-8-19 15:52 编辑
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