complication
abstract
asthma
background
care
clinic
clinical
concept
copd
defeat
diseases
disorder
doctor
effect
equipment
exam
examination
explaining
hand
health
heavy
hospital
illness
image
industrial
involvement
looking
lung
man
medical
medicine
observation
occupational
people
person
research
science
scientific
scrutiny
service
silicosis
study
support
training
visual
worker
workup
xray