Atik T, Aykut A, Hazan F, Onay H, Goksen D, Darcan S, Tukun A, Ozkinay F. Mutation Spectrum and Phenotypic Features in Noonan Syndrome with PTPN11 Mutations: Definition of Two Novel Mutations. Indian J Pediatr. 2016 Jun;83(6):517–21. doi: 10.1007/s12098-015-1998-6. PMID: 26817465.