[1] Univ Gadjah Mada, Neuromucular Div, Dept Neurol, Fac Med, Yogyakarta, Indonesia
[2] Univ Gadjah Mada, Neuropediat Div, Dept Neurol, Fac Med, Yogyakarta, Indonesia
[3] Univ Gadjah Mada, Biochem, Fac Med, Yogyakarta, Indonesia
[4] Univ Gadjah Mada, Dept Pediat, Fac Med, Yogyakarta, Indonesia