Epidemiology of achondroplasia: a population-based study in Europe by Coi, A, Santoro, M, Garne, E, Pierini, A, Addor, M, Alessandri, J, Bergman, J, Bianchi, F, Boban, L, Braz, P, Cavero-Carbonell, C, Gatt, M, Haeusler, M, Klungsøyr, K, Kurinczuk, J, Lanzoni, M, Lelong, N, Luyt, K, Mokoroa, O, Mullaney, C, Nelen, V, Neville, A, O'Mahony, M, Perthus, I, Rankin, J, Rissmann, A, Rouget, F, Schaub, B, Tucker, D, Wellesley, D, Wisniewska, K, Zymak-Zakutnia, N, Barišić, I