Sugayama, Sofia Mizuho Miura, Cláudio Leone, Maria de Lourdes Lopes Ferrari Chauffaille, Thelma Suely Okay, and Chong Ae Kim. 2007. “ Williams Syndrome: Development of a New Scoring System for Clinical Diagnosis ”. Clinics 62 (2): 159-66. https://doi.org/10.1590/S1807-59322007000200011.