Wei, Yu-Chen
Zhang, Zhiyun
Chen, Yi-An
Wu, Cheng-Ham
Liu, Zong-Ying
Ho, Ssu-Yu
Liu, Jiun-Chi
Lin, Jia-An
Chou, Pi-Tai
Article History
Received: 15 October 2018
Accepted: 9 January 2019
First Online: 28 January 2019
Change Date: 8 February 2019
Change Type: Correction
Change Details: The original PDF and HTML versions of this Article contained errors in Eqs. (1) and (2). In both equations the approximately equal to symbol displayed incorrectly as ». This has been corrected in both the PDF and HTML versions of the Article.
Competing interests
: The authors declare no competing interests.