1 MYO1E MUTATIONS AND CHILDHOOD FAMILIAL FOCAL SEGMENTAL GLOMERULOSCLEROSIS Supplementary Online Appendix Authors’ contributions Marina Noris, Giuseppe Remuzzi, Caterina Mele and Paraskevas Iatropoulos designed the study. Caterina Mele, Paraskevas Iatropolous, Roberta Donadelli, Ramona Maranta, Paola Cassis, Simona Buelli, Susanna Tomasoni, Rossella Piras, Mira Krendel, Serena Bettoni, Carmine Pecoraro, Isabella Abbate, Edgar Otto, Franz Schaefer, Sevinc Emre, Fatith Ozaltin and Tulin Ibsirlioglu gathered the data. Marina Noris, Caterina Mele and Paraskevas Iatropoulos, Giuseppe Remuzzi, Paola Cassis, Simona Buelli, Marina Morigi, Ariela Benigni, Mira Krendel, Massimo Delledonne, Maria Rosaria Capobianchi, Friedhelm Hildebrandt, Fabio Macciardi and Andrea Calabria analyzed the data. Marina Noris, Caterina Mele, Paraskevas Iatropoulos and Giuseppe Remuzzi vouch for the data and the analysis. Marina Noris, Caterina Mele, Paraskevas Iatropoulos and Giuseppe Remuzzi wrote and decided to publish the paper. All the Authors agreed to publish the paper. Marina Noris wrote the first draft of the paper. There is no agreement concerning confidentiality of the data between the sponsors ad the authors or the institutions.