Which hospitals and doctors are reputed for the treatment of stage 4 lung cancer in India?

I am writing for my father's treatment. He has been diagnosed with stage 4 lung cancer in April 2018. He had gone through 6 cycles of of Alimta and carboplatin till October and then two cylces of Alimta only till December 2018. Up to October, he was doing great, had no side effects and his tumor size went down. After that he became very fatigued and also his tumor size increased significantly. In January 2019, Doctor put him on Docetaxel and so far he is doing good with no side effect. But, we would like to continue his treatment in your reputed hospital. I have attached his initial PET scan (April 2018) and recent PET scan (January 2019) along with few other CT scan. I appreciate if you could suggest me the doctor for his treatment and help me getting the appointments. Also, it would be very helpful if you can give me idea about the expenses. Since he will be coming from Bangladesh, it will take time to get visa and arrange rest of the stuff. Currently I am in Canada and planning to join him during his initial treatment at your hospital, preferably in March.