Widmann, Matthias
Lee, Sang-Yun
Rendler, Torsten
Son, Nguyen Tien
Fedder, Helmut
Paik, Seoyoung
Yang, Li-Ping
Zhao, Nan
Yang, Sen
Booker, Ian
Denisenko, Andrej
Jamali, Mohammad
Momenzadeh, S. Ali
Gerhardt, Ilja
Ohshima, Takeshi
Gali, Adam
Janzén, Erik
Wrachtrup, Jörg
Article History
Received: 29 June 2014
Accepted: 20 October 2014
First Online: 1 December 2014
Competing interests
: The authors declare no competing financial interests.