Socioeconomic differences in childhood vaccination in developed countries: a systematic review of quantitative studies.
Bocquier A, Ward J, Raude J, Peretti-Watel P, Verger P.
Expert Rev Vaccines. 2017 Sep 21:1-12.
http://www.tandfonline.com/doi/abs/10.1080/14760584.2017.1381020?journalCode=ierv20
