Cigarette smoking dose as a predictor of need for surgical intervention in patients with lumbar disk herniation oleh Shang-Lin Chiang, Chia-Huei Lin, Shih-Hung Tsai, Shin-Tsu Chang, Shiou-Ping Lin, Shou-Min Ni, Shun-Hwa Wei, Yung-Tsan Wu, Fu-Huang Lin, Liang-Cheng Chen