Vinceti M, Balboni E, Rothman KJ, Teggi S, Bellino S, Pezzotti P, Ferrari F, Orsini N, Filippini T. Substantial impact of mobility restrictions on reducing COVID-19 incidence in Italy in 2020. J Travel Med. 2022 Sep;29(6):taac081. doi: 10.1093/jtm/taac081
Bowater RJ, Hartley LC, Lilford RJ. Are cardiovascular trial results systematically different between North America and Europe? A study based on intra-meta-analysis comparisons. Arch Cardiovasc Dis. 2015 Jan;108(1):23-38. doi: 10.1016/j.acvd.2014.03.005