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Gill DP, Blunt W, Bartol C, Pulford RW, De Cruz A, Simmavong PK, Gavarkovs A, Newhouse I, Pearson E, Ostenfeldt B, Law B, Karvinen K, Moffit P, Jones G, Watson C, Zou G, Petrella RJ.Gill DP, et al.BMC Public Health. 2017 Feb 7;17(1):173. doi: 10.1186/s12889-017-4047-8.BMC Public Health. 2017.PMID: 28173782Free PMC article.Clinical Trial.
Beckerman-Hsu JP, Aftosmes-Tobio A, Gavarkovs A, Kitos N, Figueroa R, Kalyoncu ZB, Lansburg K, Yu X, Kazik C, Vigilante A, Leonard J, Torrico M, Jurkowski JM, Davison KK.Beckerman-Hsu JP, et al.Trials. 2020 Jul 23;21(1):674. doi: 10.1186/s13063-020-04571-0.Trials. 2020.PMID: 32703293Free PMC article.