1. Rheumatoid Arthritis with High Serum KL-6 Complicating Malignant Tumor: Two Case Reports
   Hiroyuki Tsuchie et al, 2015, Open Journal of Orthopedics CrossRef
2. Two cases of rectal cancer metastasizing to the lung with a high serum KL-6 level
   Megumi Kiyoi et al, 2008, The Journal of the Japanese Associtation for Chest Surgery CrossRef