id	keyword
ertr-885	medical
ertr-885	tourism
ertr-885	india
ertr-885	kolkata
ertr-885	research
ertr-885	treatment
ertr-885	tourists
ertr-885	patients
ertr-885	healthcare
ertr-885	tourism research
ertr-885	hospitals
ertr-885	international
ertr-885	review
ertr-885	services
ertr-885	vol
ertr-885	ertr
ertr-885	factors
ertr-885	table