^†Table 3.

Abnormalities confirmed on further investigations in the pre- and post-exposure groups

Group	Chest radiographic abnormality	Final diagnosis
pre-EG	Left upper zone infiltrates	Tuberculosis
	Cardiomegaly	Anemia with splenomegaly
	Cardiomegaly	Severe mitral regurgitation
	Cardiomegaly	Atrial septal defect
	Cardiomegaly	Mitral valve prolapse with severe mitral regurgitation
	Prominent pulmonary bay	Patent foramen ovale
	Prominent pulmonary bay	Left ventricular hypertrophy
post-EG	Widened right paratracheal stripe - mediastinal adenopathy	Tuberculosis
	Left upper zone cavity	Tuberculosis
	Ill-defined opacity in the right lung apex	Tuberculosis
	Widened right paratracheal stripe - mediastinal adenopathy	Tuberculosis
	Left pleural effusion	Tuberculosis
	Mild cardiomegaly	Multiple ventricular premature complexes

pre-EG: Pre-exposure group. post-EG: Post-exposure group