Sriati, Sriwijaya University, Indonesia
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Muhammad Firdaus, IPB University, Indonesia.
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Burhanuddin, IPB University, Indonesia. 
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Lukman Mohammad Baga, IPB University, Indonesia.
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Diana Chalil, University of Sumatera Utara, Indonesia.
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Fournita Agustina, University of Bangka Belitung, Indonesia.
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Evahelda, University of Bangka Belitug, Indonesia.
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