Ranganath, LR, Milan, AM, Hughes, AT, Dutton, JJ, Fitzgerald, R, Briggs, MC, Bygott, H, Psarelli, EE, Cox, TF, Gallagher, JA, Jarvis, JC, van Kan, C, Hall, AK, Laan, D, Olsson, B, Szamosi, J, Rudebeck, M, Kullenberg, T, Cronlund, A, Svensson, L et al, Junestrand, C, Ayoob, H, Timmis, OG, Sireau, N, Le Quan Sang, KH, Genovese, F, Braconi, D, Santucci, A, Nemethova, M, Zatkova, A, McCaffrey, J, Christensen, P, Ross, G, Imrich, R and Rovensky, J (2014) Suitability Of Nitisinone In Alkaptonuria 1 (SONIA 1): an international, multicentre, randomised, open-label, no-treatment controlled, parallel-group, dose-response study to investigate the effect of once daily nitisinone on 24-h urinary homogentisic acid excretion in patients with alkaptonuria after 4 weeks of treatment. Annals of the Rheumatic Diseases. ISSN 1468-2060