Long-Term Observations of Patients with Infantile Spinal Muscular Atrophy with Respiratory Distress Type 1 (SMARD1) - Rudnik-Schöneborn, S; Stolz, P; Varon, R; Grohmann, K; Schächtele, M; Ketelsen, U -P; Stavrou, D; Kurz, H; Hübner, C; Zerres, K (Neuropediatrics, 2004)