Biofilm morphotypes and population structure among Staphylococcus epidermidis from commensal and clinical samples by Harris, L, Murray, S, Pascoe, B, Bray, J, Meric, G, Magerios, L, Wilkinson, T, Jeeves, R, Rohde, H, Schwarz, S, de Lencastre, H, Miragaia, M, Rolo, J, Bowden, R, Jolley, K, Maiden, M, Mack, D, Sheppard, S