Just informal patient payments are not enough, 'personal connections' and knowledge of the 'rules' are also required: a logistic regression analysis of informal practices in health care in UkraineLevenets, Olena; Stepurko, Tetiana; Polese, Abel; Pavlova, Milena; Groot, WimHealth Economics, Policy and Law2025 / 21 p https://doi.org/10.1017/S1744133124000215 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS