How can I go to Prince of Wales Hospital and back to Butterfly on Prat Hotel Hong Kong?

Do you refer to the transportation from the hotel to the hospital and vice versa?
If yes, take bus no.281A at Haiphong Road Tsim Sha Tsui, get off at City One Railway Station. The travel time is about 55 mins. It costs 7.8 HKD per person. Then walk southwest around 350 yards to find the destination. The return way is the same.