INTERVAL (investigation of NICE technologies for enabling risk-variable-adjusted-length) dental recalls trial: a multicentre randomised controlled trial investigating the best dent... oleh Jan E. Clarkson, Nigel B. Pitts, Debbie Bonetti, Dwayne Boyers, Hazel Braid, Robert Elford, Patrick A. Fee, Ruth Floate, Beatriz Goulão, Gerry Humphris, Ian Needleman, John D. T. Norrie, Fiona Ord, Marjon van der Pol, Craig R. Ramsay, David N. J. Ricketts, Helen V. Worthington, Linda Young, INTERVAL Trial Collaboration