GC-MS analysis and antibacterial activity of ethanolic and water extracts of Malaysian Heterotrigona itama propolis against selected human pathogenic bacteria by Mohd Zohdi, Rozaini, Adli, Muhammad Amirul, Mohsin, Hanis Fadzillah, Muhamad Mokhtar, Shahida, Muhammad Low, Anis Low, Awang Junaidi, Awang Hazmi, Jahrudin, Dzu Hendra Ja