1. Center for Geomicrobiology, Section for Microbiology, Department of Bioscience; Aarhus University; Aarhus Denmark
2. Section for Microbiology, Department of Bioscience; Aarhus University; Aarhus Denmark
3. Department of Geophysics; Colorado School of Mines; Golden Colorado USA
4. ISTerre, CNRS, UMR CNRS 5275; Université de Savoie; Le Bourget du Lac France