Protocol for the National Nurse Health Study (NNHS): a web-based ambispective cohort study.

Lin ZhuoHeli ZhangRongmei GengPanfeng WangLin ZengYing ChePeng WangPengfei LiTao HuangBaohua LiSiyan Zhan

Published in: BMJ open (2021)

The study was registered on Clinicaltrials.gov (https://clinicaltrials.gov/ct2/show/NCT04572347) and the China Cohort Consortium (http://chinacohort.bjmu.edu.cn/project/102/).

Keyphrases

healthcare
public health
quality improvement
randomized controlled trial
computed tomography
primary care
mental health
squamous cell carcinoma
magnetic resonance
lymph node metastasis