The Study Observes Afatinib as First-line Treatment in Patients With Epidermal Growth Factor Receptor (EGFR) Mutation-positive Advanced Non-small Cell Lung Cancer

Peking Union Medical College Hospital, Beijing

China Shenyang Chest Hospital, Shenyang

The First Affiliated Hospital, Zhejiang University, Hangzhou

The First Affiliated Hospital of Zhengzhou Unviersity, Zhengzhou

The First Afiliated Hospital, Sun Yet-sen University, Guangzhou

First Affiliated Hospital of Guangzhou Medical University, Guangzhou

Shenzhen People's Hospital, Shenzhen

Zhongshan People's Hospital, Zhongshan

Hainan Cancer Hospital, Haikou

West China Hospital, Chengdu