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

[This corrects the article DOI: 10.1016/j.ijcha.2020.100561.][This corrects the article DOI: 10.1016/j.ijcha.2018.12.003.][This corrects the article DOI: 10.1016/j.ijcha.2020.100539.][This corrects the article DOI: 10.1016/j.ijcha.2020.100477.][This corrects the article DOI: 10.1016/j.ijcha.2020.100476.][This corrects the article DOI: 10.1016/j.ijcha.2020.100505.][This corrects the article DOI: 10.1016/j.ijcha.2020.100530.][This corrects the article DOI: 10.1016/j.ijcha.2018.02.001.][This corrects the article DOI: 10.1016/j.ijcha.2019.100464.][This corrects the article DOI: 10.1016/j.ijcha.2019.100426.][This corrects the article DOI: 10.1016/j.ijcha.2019.100418.][This corrects the article DOI: 10.1016/j.ijcha.2020.100537.][This corrects the article DOI: 10.1016/j.ijcha.2018.03.006.][This corrects the article DOI: 10.1016/j.ijcha.2020.100540.][This corrects the article DOI: 10.1016/j.ijcha.2019.100406.].