TY - JOUR T1 - Informal payments by patients for health services: prevalence and determinants JO - The Service Industries Journal PY - 2018/03/21 AU - Horodnic AV AU - Williams CC ED - DO - DOI: 10.1080/02642069.2018.1450870 PB - Informa UK Limited VL - 38 IS - 11-12 SP - 841 EP - 855 Y2 - 2025/03/13 ER -