Lee, MD, K. H.; Kim, MD, M. K.; Soo Hyun, MD, M.; Kim, MD, J. Y.; Park, MD, K. U.; Song, MD, PhD, H. S.; Lee, MD, S. A.; Lee, MD, W. S.; Bae, MD, S. H.; Ryoo, MD, H. M.; Cho, MD, Y. Y. Clinical Effectiveness and Safety of OROS® Hydromorphone in Breakthrough Cancer Pain Treatment: A Multicenter, Prospective, Open-Label Study in Korean Patients. J of Opioid Management 2012, 8, 243-252.