Change in healthcare professionals' perception of self-efficacy for providing dietary advice after completing a massive open online course: an uncontrolled community trial in 64 Brazilian municipalities, 2022-2024

医疗保健专业人员完成大规模开放式在线课程后，其提供膳食建议的自我效能感发生改变：一项在巴西64个城市开展的非对照社区试验，2022-2024年