Given the task definition and input, reply with output. In this task, you are given a question. You have to answer the question based on your information.

Mariana Kovacevic is a Serbian traditional healer who has specialized in the use of horse placenta treatment to heal athletes, during the duration of the 2012 African Cup of Nations in Gabon and Equatorial Guinea she used the horse placenta treatment to heal Asamoah Gyan, a Ghanaian professional footballer who plays as a striker for which team, and captains the Ghanaian national team?
Kayserispor