Efficacy of Nasal Spray, Mouth Spray, and Mouthwash Containing Limonene, Cetylpyridinium Chloride, and Monolaurin in COVID-19 Management: A Double-Blind, Randomized, Placebo-Controlled Trial
Ponphaiboon et al., MDPI AG, doi:10.20944/preprints202509.1594.v1
https://c19early.org/ponphaiboon2.html