1. Tourism and Hospitality Management School, Universidade Europeia, Lisbon, Portugal
2. ESCAD—School of Science and Administration, Lisbon, Portugal
3. Tourism Department, Universidade Lusófona de Humanidades e Tecnologias, Lisbon, Portugal
4. CiTUR, School of Tourism and Maritime Technology, Polytechnique of Leiria, Peniche, Portugal
5. Heilbronn University, Heilbronn, Germany