[1] Univ Cent Florida, Coll Med, Nemours Childrens Hosp, Orlando, FL 32816 USA
[2] Catholic Univ, Paediat Neurol Unit, Rome, Italy
[3] Policlin Gemelli, Ctr Clin Nemo, Rome, Italy
[4] Childrens Hosp Philadelphia, Div Pulnzonol, Philadelphia, PA 19104 USA
[5] Royal Brompton & Harefield NHS Fdn Trust, NIHR Resp Biomed Res Unit, London, England
[6] Univ Wisconsin, Dept Pediat, Amer Family Childrens Hosp, Div Pediat Pulm,Sch Med & Publ Hlth, Madison, WI USA
[7] Harvard Med Sch, Boston Childrens Hosp, Dept Anesthesiol Perioperaf & Pain Med, Div Crit Care, Boston, MA USA
[8] Univ Freiburg, Dept Neuropediat & Muscle Disorders, Med Ctr, Fac Med, Freiburg, Germany
[9] Univ Texas Southwestern Med Ctr Dallas, Dept Pediat, Div Pediat Neurol, Dallas, TX 75390 USA
[10] Univ Texas Southwestern Med Ctr Dallas, Dept Neurol, Div Pediat Neurol, Dallas, TX 75390 USA
[11] Univ Texas Southwestern Med Ctr Dallas, Dept Neurotherapeut, Div Pediat Neurol, Dallas, TX 75390 USA
[12] Childrens Med Ctr, Dallas, TX 75235 USA
[13] Johns Hopkins Univ, Dept Neurol, Baltimore, MD 21218 USA
[14] Newcastle Univ, Policy Eth & Life Sci Res Ctr, Newcastle Upon Tyne, Tyne & Wear, England
[15] UCL Great Ormond St Inst Child Hlth, Dubowitz Neuromuscular Ctr, London, England
[16] Great Ormond St Hosp Sick Children, London, England
[17] Univ Cologne, Inst Human Genet, Ctr Mol Med, Cologne, Germany
[18] Univ Cologne, Inst Genet, Cologne, Germany
[19] Columbia Univ, Med Ctr, Dept Rehabil & Regenerat Med & Neurol, New York, NY USA
[20] Catholic Univ, Paediat Neurol Unit, Rome, Italy
[21] Policlin Gemelli, Ctr Clin Nemo, Rome, Italy
[22] Columbia Univ, Dept Orthopaed Surg, Med Ctr, New York, NY USA
[23] Harvard Med Sch, Childrens Hosp, Dept Orthopaed Surg, Boston, MA USA
[24] Univ Versailles St Quentinen En Yvelines, Hop Univ Paris Ile de France Ouest, Hop Raymond Poincare,INSERM,U 1179, AP HP,Unit Neuromuscular Disorders,Dept Pediat In, Versailles, France
[25] Bambino Gesit Childrens Res Hosp, Unit Neuromuscular & Neurodegenerat Disorders, Dept Neurosci & Neurorehabil, Rome, Italy
[26] Univ Utah, Intermt Healthcare, Salt Lake City, UT USA
[27] SMA Fdn, New York, NY USA
[28] Karolinska Inst, Dept Womens & Childrens Hlth, Paediat Neurol, Stockholm, Sweden