I would also say accident insurance.
However a letter I received the other day may indicate otherwise...
I fell downstairs in August last year and landed on my knee. I am (was) a regular runner, and since then I've had a terrible pain in my knee when I run. I went to the Sport Clinic in Zurich, and had 2 lots of physio. Because my knee didn't improve with regular physio I was sent to the Schulthess Klink for alternative treatment.
However I received a letter from my accident insurance the other day which stated that their doctor (who has never examined me) says that this knee issue should clear up within one week to three months and therefore they won't pay any further costs. Everything must be paid via my health insurance going forward.
Hopefully your accident insurance provider will be different! But only one way to find out...
Best of luck!