@tengolotodo Thank you very much, you read my past story carefully and understood the reality of the matter, in fact, till the oxygen concentrator was not available, I felt that now my wife will hardly be able to survive. But God always helps his devotees, so in that crisis also an organization gave me its oxygen concentrator. I would also like to tell you that I went there only hoping for an oxygen cylinder. Cylinders were not even available in those days. But then a miracle happened and they gave me that life-saving device which I had not expected at all. Impressed by this miracle, I decided to help other patients.