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1. Association between vitamin D deficiency and otitis media with effusion in children: a systematic review and meta-analysis

- Ratna Dwi Restuti

- Eka Dian Safitri

- Respati Wulansari Ranakusuma

- Ayu Astria Sriyana

- Harim Priyono

- Rangga Rayendra Saleh

- Dora A Marpaung

- Gilbert Lazarus