| Affiliation: | 2. Lung Cancer Group Cologne, Department I of Internal Medicine, Center for Integrated Oncology Cologne Bonn, University Hospital of Cologne, Cologne, Germany;3. Department of Nuclear Medicine, Center for Integrated Oncology Cologne Bonn, University Hospital of Cologne, Cologne, Germany;1. Economics and Management School, Wuhan University, Wuhan, 430072, China;2. School of Management, Xi''an Jiaotong University, Xi''an, 710049, China;1. School of Hotel and Tourism Management, Youngsan University, 142 Bansong Beltway, Haeundae-gu, Busan 48015, South Korea;2. College of Hospitality and Tourism Management, Sejong University, 98 Gunja-Dong, Gwanjin-Gu, Seoul 143-747, South Korea |
