Graham JE, Moore JE, Jiru X, Moore JE, Goodall EA, Dooley JSG, Hayes V, Dartt DA, Downes SC & Moore CBT. Ocular Pathogen or Commensal: A PCR Based Study of Surface Bacterial Flora in Normal and Dry Eyes. Investigative Ophthalmology & Visual Science. 2007;48:5616-5623.