Clearly state the funding sources for the research and preparation of the article, including the name of the funding agency and grant number. If the funder participated in study design, data collection, analysis and interpretation, report writing, or the decision to submit the manuscript, this must be clearly stated. Indicate if there was no funding support.

Example: "This study was supported by the National Institutes of Health [Grant Nos. xxxx, yyyy] and the Bill & Melinda Gates Foundation (Seattle, WA, USA) [Grant No. zzzz]." Example for no funding support: "This study did not receive any specific funding from public, commercial, or non-profit funding agencies."