Percutaneous endoscopic gastrostomy using 10-cc syringe tubes for amyotrophic lateral sclerosis patients with limited mouth opening - Lee, S. P.; Lee, H. L.; Kim, D. C.; Lee, K. N.; Lee, O. Y.; Choi, H. S.; Yoon, B. C.; Jun, D. W.; Hahm, J. S.; Joo, Y. W. (Endoscopy, 2012)