TY - JOUR T1 - Commentary on 'Payment in challenge studies: ethics, attitudes and a new payment for risk model' JO - Journal of Medical Ethics UR - https://doi.org/10.1136/medethics-2020-106975 PY - 2020/11/05 AU - Payne R ED - DO - DOI: 10.1136/medethics-2020-106975 PB - BMJ VL - 46 IS - 12 SP - 829 EP - 830 Y2 - 2025/11/05 ER -