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Efficacy and safety of Galgeun-tang-ga-cheongung-sinyi for nasal congestion with common cold: A study protocol for randomized, double-blind, placebo-controlled, parallel, multicenter clinical trial

Fig 2

Flowchart of the study plan.

GGTCS, Galgeun-tang-ga-cheongung-sinyi.

Fig 2

doi: https://doi.org/10.1371/journal.pone.0342433.g002