Deddy Abdi Syahputra, Zainuddin Amir, Pandiaman Pandia Departemen Pulmonologi dan Ilmu Kedokteran Respirasi, Fakultas Kedokteran Universitas Sumatera Utara, RSUP H. Adam Malik Medan Abstract Background: Organic dust cotton dust exposure in the working environment can cause obatructive lung disease that called byssinosis disease. The purpose of this study is to determine the relationship between the […]