By Sackett, David L., Haynes, R.B., Tugwell, Peter, Guyatt, G.
By I.G. McFarlane, Adrian Bomford, Roy A. Sherwood, Gwyn McCreanor, Dr. William J. Marshall, MA, MSc, PhD, MBBS, FRCP, FRCPath, FRCPEdin, FIBiol
By Roger Frampton
By Chamberlain, E.Noble, Ogilvie, Colin