We also extracted data presented only in graphs and figures whenever possible. [cochranelibrary.com]

The effects of treatment with antibiotics, laser and acupuncture upon chronic maxillary sinusitis in children. Am J Chin Med, 1982;10(1-40):55-8. 23. Yarnell E, Abascal K, Hooper CG. [passeportsante.net]

The participants were not aware which treatment they received, and most of the studies stated that treatment and placebo products were indistinguishable from each other. [cochranelibrary.com]

Epidemiology and burden of nasal congestion. Stewart M, Ferguson B, Fromer L. Int J Gen Med. 2010 Apr 8;3:37-45. 28. De la rhinite allergique aux pathologies sinusiennes (sinusite/polypose) : les liens épidémiologiques et expérimentaux. P. Demoly. [passeportsante.net]

This is because sinusitis in children differs from that in adults, for example regarding anatomy, diagnosis, epidemiology and microbiology (Hsin 2010). Newborns have maxillary sinuses the size of a bean. [cochranelibrary.com]