我又深入烟酒了一下，发现那个who的data来自于六个国家8500个不同种族的娃，但那个Oman是哪呀？

以下为引用：

The MGRS collected primary growth data and related information from approximately 8500 children from widely different ethnic backgrounds and cultural settings (Brazil, Ghana, India, Norway, Oman and the USA). The new growth curves are expected to provide a single international standard that represents the best description of physiological growth for all children from birth to five years of age and to establish the breastfed infant as the normative model for growth and development.