Liu, Yan
Chen, Gengxu
Rong, Youying
McGuinness, Liam Paul
Jelezko, Fedor
Tamura, Syuto
Tanii, Takashi
Teraji, Tokuyuki
Onoda, Shinobu
Ohshima, Takeshi
Isoya, Junichi
Shinada, Takahiro
Wu, E
Zeng, Heping
Article History
Received: 25 February 2015
Accepted: 23 June 2015
First Online: 23 July 2015
Competing interests
: The authors declare no competing financial interests.