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Copyright (c) 2017 Martinus Martinus, Gandes Retno Rahayu, Ova Emilia
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Martinus Martinus
* Corresponding Author
Fakultas Kedokteran Universitas Islam Sumatera Utara, Medan
Indonesia
Gandes Retno Rahayu
Fakultas Kedokteran Universitas Gadjah Mada, Yogyakarta
Indonesia
Ova Emilia
Fakultas Kedokteran Universitas Gadjah Mada, Yogyakarta
Indonesia