Montelukast in paediatric asthma and allergic rhinitis: a systematic review and meta-analysis.

"Conflict of interest: All authors have nothing to disclose."

"Support statement: Financial support for this study was provided through grants by the Instituto de Salud Carlos III FEDER: Fondo Europeo de Desarrollo Regional (PI15/00449) and DIUE of Generalitat de Catalunya (AGAUR 2021 SGR 00624, 2017 SGR 452). The following researchers have worked on this manuscript while funded by grants: K. Mayoral and V. Zamora (Instituto de Salud Carlos III FEDER: Fondo Europeo de Desarrollo Regional FI16/00071, FI19/00229), K. Mayoral also obtained financial support from CIBER of Epidemiology and Public Health CIBERESP for a short PhD stay abroad, and C. Lizano-Barrantes (University of Costa Rica OAICE-85-2019). The funding agreements ensure the authors’ independence in designing the study, interpreting the data, and writing and publishing the report. Funding information for this article has been deposited with the Crossref Funder Registry."