Open Access
This article is an erratum for:

Volume 9, Number 4, December 2019
Article Number 30
Number of page(s) 1
Published online 14 November 2019

The authors have informed the journal about several errors in the published version of this article, which they missed to correct before publication. These errors occur in the article in the following parts: Table 1 and Table 3.

Futher, on page 33, in 2.3. Intervention, considering the 80% probability of testing, and the type 1 error of 5% is changed to considering the 80% power of test and 5% probability of type 1 error. In addition, on page 34, 58.9 ± 2.24 and 62.93 ± 2.35 should be 58.9 ± 12.29 and 62.93 ± 12.87.

Finally, the affiliation is changed from Department of Nursing and midwifery to Department of Nursing. In the new version all these tables are corrected. The authors, editors and the publisher apologize for these inconveniences.

© Author(s) 2019. This article is published with open access by China Medical University

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