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Risma Dumiri Manurung https://scholar.google.com/citations?user=-YYD-QMA Poltekkes Kemenkes Medan Indonesia
Sulastri Galumbang Panahatan Tambunan Poltekkes Kemenkes Medan Indonesia
Jl. Jamin Ginting KM 13,5 Kel. Lau Cih Kec. Medan Tuntungan Sumut
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