Report - PREVALENS HELICOBACTER PYLORI DALAM …eprints.usm.my/8978/1/PREVALENS_HELICOBACTER... · 1.6.2.3 Ujian Perkumuhan Ammonium (15NH. 4 +) 28 . 1.6.2.4 Kaedah PCR (Sampel Saliva, Plak

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