1 Marine Microbiology Group, Department of Ecology and Marine Resources, Institut Mediterrani d'Estudis Avançats (CSIC-UIB), E-07190 Esporles, Balearic Islands, Spain.
2 Departamento de Microbiología y Genética, Edificio Departamental, Lab, Universidad de Salamanca, 214, Campus Miguel de Unamuno, 37007, Salamanca, Spain.
3 Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK. iain.sutcliffe@unn.ac.uk.