Silica Exposure Appears Causal in Resurgent Severe Coal Workers’ Pneumoconiosis oleh Robert Cohen, Cecile Rose, Leonard Go, Lauren Zell-Baran, Kirsten Almberg, Emily Sarver, Heather Lowers, Cayla Iwaniuk, Sidney Clingerman, Diane Richardson, Jerrold Abraham, Carlyne Cool, Angela Franko, Ann Hubbs, Jill Murray, Marlene Orandle, Soma Sanyal, Naseema Vorajee, Edward Petsonk, Rafia Zulfikar, Francis Green