1. Department of Nutrition and Food HygieneSchool of Public HealthPeking University Xueyuan Road 38 Haidian Beijing 100083 China
2. Research and Development DepartmentHeilongjiang Feihe Dairy Co., Ltd. C-16, 10A Jiuxianqiao Rd. Chaoyang Beijing 100015 China
3. Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food SafetyPeking University Xueyuan Road 38 Haidian Beijing 100083 China