Youssef, Noha H
Rinke, Christian
Stepanauskas, Ramunas
Farag, Ibrahim
Woyke, Tanja
Elshahed, Mostafa S
Article History
Received: 1 May 2014
Revised: 22 June 2014
Accepted: 1 July 2014
First Online: 1 August 2014
Competing interests
: The authors declare no conflict of interest.