I would like to thank warmly the following people for their help and support:

• António M. Franquinho Aguiar
• Angel Anta
• Pascale Bezard-Falgas
• Thierry Bourgoin
• Juan Pedro R. Bouvet
• Paul A. Brown
• Daniel Burckhardt
• Wanzhi Cai 彩万志
• Pragya Chalise
• Rodrigo Diaz
• Laurent Fauvre
• Farnaz Fazaeli-Montreuil
• Carl-Axel Gertsson
• Tim G Grout
• Lars Ove Hansen
• Gernot Kunz
• Xinyu Luo 罗心宇
• Igor Malenovský
• Chris Mallory
• Roland Mühlethaler
• Warrick Nelson
• Diana Percy
• Claude Pilon
• Terry Priest
• Dalva L. Queiroz
• Sergio Rothmann
• Iñigo Sánchez
• Nicolas Sauvion
• Gabrijel Seljak
• Adeline Soulier-Perkins
• Gary Taylor
• Gábor Vétek
• David Waters
• Christiane Weirauch
• Alfred G. Wheeler
• Sheryl Yap