Acknowledgement to Reviewers of Challenges in 2013

The editors of Challenges would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2013:

• Abel, Troy
• Acunia, Mauricio
• Alauddin, Mohammad
• Andrae, Anders
• Andriychuk, Mykhaylo
• Banerjee, Tannista
• Bavarian, Mona
• Belletire, Steve
• Berger, Charles
• Berlekamp, Jürgen
• Bisschop, Lieselot
• Bolter, Jay D.
• Boyes, William K.
• Bucolo, Sam
• Budd, Jim
• Cade, Willie
• Charlesworth, Sue
• Deng, Da
• Domenech, Teresa
• Dovì, Vincenzo
• Dragoman, Mircea
• Durgo, Ksenija
• Filson, Darren
• Fitzpatrick, Colin
• Foran, Barney
• Fraedrich, Klaus
• Friesner, Daniel L.
• Garcia, Alicia C.
• Garçon, Guillaume
• Goble, Rob
• Gray, Kimberly A.
• Halvorsen, Kathy
• Hamacher, Thomas
• Heidrich, Oliver
• Hosoda, Eiji
• Huges, Sara
• Iavicoli, Ivo
• Johnston, Craig
• Keiter, Steffen
• Kojima, Michikazu
• Koskinen, Ilpo
• Kravitz, Ben
• Kuehr, Ruediger
• Lankes, Franz
• Lorenz, Klaus
• Lund, Henrik
• Mahlmann, Tobias
• Marlow, Harold
• Martin, James G.
• Martinez-Frias, Jesus
• Mattelmaki, Tuuli
• Megalos, Mark A.
• Ongondo, Francis Otieno
• Qian, Cheryl Zhenyu
• Richardson, David B.
• Rifer, Wayne
• Saikawa, Eri
• Santero, Nicholas J.
• Sárfi, Robert J.
• Scholz, Stefan
• Seiler, Thomas-Benjamin
• Sertyesilisik, Begum
• Sini, Mourad
• Späth, Philipp
• Speed, Shaun
• Spiller, Marc
• Stainback, George Andrew
• Stremke, Sven
• Stupak, Inge
• Sunmonu, Taofik
• Victor, David G.
• Wagner, Travis
• Warheit, David B.
• Winterhalter, Boris
• Zevenhoven, Ron
• Zumbrunnen, David A.