The Japanese respiratory society guidelines for the management of cough and sputum (digest edition).2021 · Mukae H, Kaneko T, Obase Y, Shinkai M, Katsunuma T, Takeyama K, Terada J, Niimi A, Matsuse H, Yatera K, Yamamoto Y, Azuma A, Arakawa H, Iwanaga T, Ogawa H, Kurahashi K, Gon Y, Sakamoto H, Shibata Y, Tamada T, Nishioka Y, Haranaga S, Fujieda S, Miyashita N, Mochizuki H, Yokoyama A, Yoshihara S, Tamaoki J, JRS guidelines committee for the management of cough and sputum