共 50 条
- [33] Covid-19: Trial participants are offered approved vaccines so they can travel abroad BMJ-BRITISH MEDICAL JOURNAL, 2021, 375 : n2474
- [36] Efficacy of COVID-19 vaccines: From clinical trials toreal life THERAPIE, 2021, 76 (04): : 277 - 283
- [37] Ethical issues in placebo-controlled trials of COVID-19 vaccines CADERNOS DE SAUDE PUBLICA, 2021, 37 (06):