id	keyword
ca-4987	pain
ca-4987	cancer
ca-4987	chronic
ca-4987	cancer pain
ca-4987	thailand
ca-4987	life
ca-4987	nongyao
ca-4987	suchart
ca-4987	university
ca-4987	press
ca-4987	hospital
ca-4987	opioids
ca-4987	home
ca-4987	category
ca-4987	clinic
ca-4987	mind
ca-4987	patients
ca-4987	disease