Source: https://www.researchgate.net/publication/49777507_Efficiency_of_hypertonic_and_isotonic_seawater_solutions_in_chronic_rhinosinusitis/fulltext/0e60a4b5f0c4cf5df7c52661/Efficiency-of-hypertonic-and-isotonic-seawater-solutions-in-chronic-rhinosinusitis.pdf