摘要
This article has been retracted:please see Elsevier Policy on Article Withdrawal(https://www.elsevier.com/about/our-business/policies/article-withdrawal).This article has been retracted at the request of Editorial Office and Authors.The article duplicates significant parts of a paper that had already appeared in[Nurs J Chin PLA,2017,34(8):22e26,68.http://www.cnki.com.cn/Article/CJFDTotal-JFHL201708006.htm],written in Chinese.One of the conditions of submission of a paper for publication is that authors declare explicitly that the paper has not been previously published and is not under consideration for publication elsewhere.Re-use of any data should be appropriately cited.Apologies are offered to readers of the journal that this was not detected during the submission process.
