1. Graduate School of Hotel and Restaurant Administration in Food and Nutrition, Symbiotic LifeTECH Research Center, College of Human Ecology, Yonsei University, Seodaemun-gu, Korea
2. Robert H. Dedman Professor of Hospitality Management, International Center for Hospitality Research & Development, Dedman College of Hospitality, Florida State University, Tallahassee, FL, USA