Singh, Neetesh
Xin, Ming
Vermeulen, Diedrik
Shtyrkova, Katia
Li, Nanxi
Callahan, Patrick T
Magden, Emir Salih
Ruocco, Alfonso
Fahrenkopf, Nicholas
Baiocco, Christopher
Kuo, Bill P-P
Radic, Stojan
Ippen, Erich
Kärtner, Franz X
Watts, Michael R
Article History
Received: 2 July 2017
Revised: 31 August 2017
Accepted: 1 September 2017
First Online: 4 September 2017
Competing interests
: The authors declare no conflict of interest.