Sayal, Kapil, Wyatt, Laura, Thomson, Louise, Holt, Grace, Ewart, Colleen, Bhardwaj, Anupam, Dubicka, Bernadka, Marshall, Tamsin, Gledhill, Julia, Lang, Alexandra, Sprange, Kirsty, Partlett, Christopher, Newman, Kristina, Moody, Sebastian, Bould, Helen, Upton, Clare, Keane, Matthew, Cox, Edward, James, Marilyn, Montgomery, Alan, "Clinical and cost effectiveness of a standardised diagnostic assessment for children and adolescents with emotional difficulties: the STADIA multi-centre RCT", Health Technology Assessment,