1. Chemotherapy Center, Yokohama Minami Kyosai Hospital, Yokohama 236-0037, Japan
2. Department of Pulmonology, Yokohama City University, Yokohama 236-0004, Japan
3. Chemotherapy Center, Yokohama City University Hospital, Yokohama 236-0004, Japan
4. Department of Respiratory, Yokohama Minami Kyosai Hospital, Yokohama 236-0037, Japan