A standardized polyphenol mixture extracted from poplar-type propolis for remission of symptoms of uncomplicated upper respiratory tract infection (URTI): A monocentric, randomized, double-blind, placebo-controlled clinical trial
1985 ◽
Vol 9
(10)
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pp. 666-675
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2010 ◽
Vol 62
(3)
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pp. 237-242
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2011 ◽
Vol 49
(4)
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pp. 136-140
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2015 ◽
Vol 163
◽
pp. 157-166
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2009 ◽
Vol 41
◽
pp. 6