We would like to acknowledge the support provided by the Department of Biomedical Sciences, University of Cagliari, Italy.

We would also like to acknowledge the help and financial support provided until November 30, 2024 by the Department of Epidemiology, Lazio regional Health Service of Lazio Region, Italy.

The Cochrane central functions are funded by royalties from its publishers, John Wiley and Sons Limited, which come from sales of subscriptions to The Cochrane Library. The individual entities of The Cochrane Collaboration are funded by a large variety of governmental, institutional and private funding sources, and are bound by organisation-wide policy limiting uses of funds from corporate sponsors. Enquiries regarding funding should be directed to the Cochrane Chief Executive Officer.