My Seattle based friend Rhona is in town since last Friday visiting his stroke stricken dad. When I called her the following day, I had known that her dad just checked out of the hospital due to pneumonia. When I called she said she was busy and told me she will call me back. She said she is still attending to a man who was at their home to check and install this portable oxygen concentrator to provide oxygen therapy to his dad. In less than 30 minutes she gave me a ring back.