1. Department of Landscape Architecture, Tunghai University, Taichung 407224, Taiwan
2. Department of Landscape Architecture, University of Illinois at Urbana-Champaign, Champaign, IL 61820
3. Department of Horticulture and Landscape Architecture, National Taiwan University, Taipei 10617, Taiwan
4. Department of Leisure Industry and Health Promotion, National Taipei University of Nursing and Health Sciences, Taipei 112303, Taiwan