1. Molecular Microbiology & Bioenergetics; Institute of Molecular Biosciences; Johann Wolfgang Goethe University Frankfurt am Main; Frankfurt Germany
2. Cell Physiology and NMR Lab; Instituto de Tecnologia Química e Biológica; Universidade Nova de Lisboa; Oeiras Portugal
3. Department of Microbiology; University of La Laguna; La Laguna Tenerife Spain
4. Department of Microbiology and Cell Science; University of Florida; Gainesville USA