To evaluate the efficacy of using feather bedding in the control of asthma symptoms.
评估使用羽绒寝具对控制气喘症状的疗效。
Cotton bedding set of many designs, available with natural down feather and also synthetic fiber filling.
棉被褥一套多种设计，可与天然羽绒，也合成纤维填充。
Cotton bedding set of many designs, available with natural down feather and also synthetic fiber filling.
棉被褥一套多种设计，可与天然羽绒，也合成纤维填充。
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