Objects
Atkins, D., Briss, P. A., Eccles, M., Flottorp, S., Guyatt, G. H., Harbour, R. T., Hill, Suzanne, Jaeschke, R., Liberati, A., Magrini, N., Mason, J., O'Connell, D., Oxman, A. D., Phillips, B., Schunemann, H., Edejer, T. T. T., Vist, G. E., Williams, J. W.. BioMed Central; 2005. Systems for grading the quality of evidence and the strength of recommendations II: Pilot study of a new system.