Boxing and Parkinson disease: a link or a myth? An 18F-FDOPA PET/CT study in retired Thai traditional boxers - Bhidayasiri, R; Chotipanich, C; Joutsa, J; Tepmongkol, S; Wannachai, N; Johansson, J; Juiklom, W; Rinne, J O (Parkinsonism Relat Disord, 2012)