Determine the Safety and Efficacy of Oxy/Nal Tablets Compared to Oxy PR in Subjects With Cancer Pain

Beijing Hospital, Beijing

307th hospital of Chinese People's medical sciences, Beijing

Beijing Cancer Hospital, Beijing

Peking University Third Hospital, Beijing

General Hospital of Beijing Military, Beijing

Pejing Union Medical College Hospital, Beijing

Hebei Medical University Fouth Hospital, Shijiazhuang

The First Hospital of China Medical University, Shenyang

The second affiliated hospital of Dalian Medical university, Dalian

Shanghai Changzheng Hospital, Shanghai

The first people's hospital of shanghai, Shanghai

The sixth hospital of shanghai, Shanghai

Jiangsu Cancer hospital, Nanjing

The central Hospital of Jinan, Jinan

Tianjin Cancer Hospital, Tianjin

The second hospital of Nanjing Medical university, Nanjing

Sir Run Run Shaw Hospital, Hangzhou

Fuzhou General Hospital of Nanjing Military Command of PLA, Fuzhou

Tongji Hospital Tongji Medical College of HUST, Wuhan

Hubei Cancer Hospital, Changsha

The First Affiliated Hospital of Xinxiang Medical University, Xinxiang

Sun yat-sen univercity cancer center, Guangzhou

Tangdu Hospital,Fourth Military Medical University, Xi’an

Fujian Medical University Union Hospital, Fuzhou

The First Affiliated Hospital of Xiamen University, Xiamen

Harbin Cancer Hospital, Harbin

Jilin Cancer Hospital, Changchun

Beijing Friendship Hospital, Beijing