1. Laboratory of Genomic Diagnostics, National Institute of Genomic Medicine, Mexico City 14610, Mexico
2. Frederick P. Whiddon College of Medicine, University of South Alabama, Mobile, Alabama 36617, USA
3. Montreal Clinical Research Institute Ribonucleoprotein Biochemistry Research Unit, Montréal, Quebec H2W1R7, Canada
4. Department of Medical Genetics, La Raza National Medical Center, Mexican Social Security Institute, Mexico City 02990, Mexico