Protocol of a Nationwide Observational Study among Patients with Nontuberculous Mycobacterium Pulmonary Disease in South Korea (NTM-KOREA) oleh Nakwon Kwak, M.D., Hongjo Choi, M.D., Ph.D., Doosoo Jeon, M.D., Byung Woo Jhun, M.D., Ph.D., Kyung-Wook Jo, M.D., Ph.D., Young Ae Kang, M.D., Ph.D., Yong-Soo Kwon, M.D., Ph.D., Myungsun Lee, M.D., Jeongha Mok, M.D., Ph.D., Tae-Sun Shim, M.D., Ph.D., Hong-Joon Shin, M.D., Ph.D., Jake Whang, Ph.D., Jae-Joon Yim, M.D.