Erratum regarding missing Declaration of Competing Interest statements in previously published articles

[This corrects the article DOI: 10.1016/j.ssmph.2019.100511.][This corrects the article DOI: 10.1016/j.ssmph.2019.100422.][This corrects the article DOI: 10.1016/j.ssmph.2019.100486.][This corrects the article DOI: 10.1016/j.ssmph.2019.100505.][This corrects the article DOI: 10.1016/j.ssmph.2019.100379.][This corrects the article DOI: 10.1016/j.ssmph.2018.08.001.][This corrects the article DOI: 10.1016/j.ssmph.2020.100576.][This corrects the article DOI: 10.1016/j.ssmph.2018.100345.][This corrects the article DOI: 10.1016/j.ssmph.2020.100557.][This corrects the article DOI: 10.1016/j.ssmph.2018.01.004.][This corrects the article DOI: 10.1016/j.ssmph.2019.100394.][This corrects the article DOI: 10.1016/j.ssmph.2019.100381.][This corrects the article DOI: 10.1016/j.ssmph.2018.07.002.][This corrects the article DOI: 10.1016/j.ssmph.2019.100462.][This corrects the article DOI: 10.1016/j.ssmph.2018.02.005.].