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HARVARD Citation
Beigi, B. et al. (n.d.). Punctal function in lacrimal drainage: the 'pipette sign' and functional ectropion. Clinical & experimental optometry. pp. 366-369. [Online].
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Beigi, B. et al. (n.d.). Punctal function in lacrimal drainage: the 'pipette sign' and functional ectropion. Clinical & experimental optometry. pp. 366-369. [Online].